The 6.1 magnitude earthquake in Aquila, Michoacán on January 12, 2025

The 6.1 magnitude earthquake in Aquila, Michoacán on January 12, 2025 | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article The 6.1 magnitude earthquake in Aquila, Michoacán on January 12, 2025 Elí Daniel Almanza Arévalo This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6926239/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract On January 12, 2025, at 02:32:53 (UTC–06), a magnitude 6.1 M W earthquake occurred with its epicenter at 18.496° N, 103.499° W (47 km SW of Coalcomán de Vázquez Pallares, Michoacán) and a hypocenter at a depth of 30 km. For structural response analysis, pseudo‑acceleration, pseudo‑velocity, and displacement spectra were generated for structural periods T from 0.0 to 5.0 s in 0.1 s increments, using a 5% critical damping ratio (ζ), based on accelerographic signals corrected and band‑pass filtered between 0.1 Hz and 10 Hz. Seismographs record ground motion along three orthogonal components: two horizontal (N–S and E–W) and one vertical. Although these axes facilitate global referencing, the maximum acceleration may occur at an intermediate direction θ, so that its projections onto the N–S and E–W axes (a cos θ and a sin θ) lie below the absolute value a. To capture the true horizontal peak, the two horizontal components are rotated and the RotD100 value is computed (the 100th percentile of the rotated amplitudes), since neither isolated component guarantees the absolute maximum. The greatest rotated acceleration in this seismic event was recorded at 29.86 km from the epicenter, with a value of 72.13 cm/s², and the maximum rotated pseudo‑acceleration reached 259.40 cm/s² at a structural period of 0.40 s. In Mexico City proper—within the area covered by the Accelerographic Network of the City of Mexico operated by the Centro de Instrumentación y Registro Sísmico A.C.—the peak rotated acceleration reached 7.17 cm/s², and the peak rotated pseudo‑acceleration was 46.14 cm/s² at a structural period of 2.1 s; both the PGA and PSA peaks occurred in the Cuauhtémoc borough, over geotechnical zone IIIc. Civil Engineering Seismology earthquake response spectrum acceleration rotation structural period dynamic amplification damage Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 1. Introduction The Michoacán seismogenic zone, part of the Mesoamerican trench, has historically generated large‑magnitude earthquakes. Although Pacific‑coast communities face high seismic hazard due to their proximity to subduction zones, Mexico City’s complex geology and wide range of natural vibration periods mean that its buildings can undergo dynamic amplification even from relatively low‑magnitude, distant events—such as the M 6.1 M W earthquake that struck Aquila, Michoacán, on January 12, 2025. In this paper we summarize the earthquake’s key parameters and its impact on the official seismic‑alert system and local accelerographic networks; present the mathematical framework for computing the maximum horizontal accelerogram through rotation of the two orthogonal horizontal signals and for constructing horizontal response spectra at a 90° rotation angle; display seismograms and response spectra from stations that recorded the tremor; show acceleration and pseudo‑acceleration maps for Mexico City, and describe selected damage observed in municipalities near the epicenter. 2. Tectonic context In Mexico’s continental and oceanic territory, five tectonic plates interact: the North American Plate, the Pacific Plate, the Rivera Plate, the Cocos Plate, and the Caribbean Plate. Seismic hazard in Mexico is divided into four major zones—A, B, C, and D (INEGI, 2021)—based on the frequency of earthquake occurrence and the maximum ground acceleration expected over a century. Zone A has not experienced any significant earthquakes in the past 80 years, and ground accelerations are not expected to exceed 10% of g. In Zone D, which experiences frequent earthquakes (with ground accelerations often exceeding 70% of g) and a history of large events, has the highest hazard. Zones B and C are intermediate, with less frequent earthquakes and ground accelerations below 70% of g (Peña & Manzano, 2015 ). The interaction between the Cocos and Rivera plates as they subduct beneath the North American Plate has given rise to mountain ranges in the country’s central and southern regions and to extensive geological fault systems. This interaction has historically generated large interplate and intraplate earthquakes. Intraplate events are due to geological faults that segment both the North American Plate and the subducted portion of the Cocos Plate. In the case of the earthquake analyzed in this paper, it was caused by the rupture of one of the faults fragmenting the Cocos Plate beneath the state of Michoacán de Ocampo; its mechanism is classified as normal (extensional) due to the stresses this tectonic slab experiences as it bends and descends into the Earth’s mantle. This geometry has been described in other studies through seismic tomography analyses (Ferrari et al., 2011). 3. Parameters of the seismic event On January 12, 2025, at 02:32:53 (UTC − 06:00) a magnitude 6.1 M W earthquake occurred (Servicio Sismológico Nacional, 2025 ), which the U.S. Geological Survey reported as a 6.2 M WW event—equivalent to a seismic moment of 2.723 × 10¹⁸ N·m (U.S. Geological Survey, 2025 ). Its epicenter was located at 18.496° N, 103.499° W (47 km SW of Coalcomán de Vázquez Pallares, Michoacán, Mexico), with a hypocentral depth of 30 km (Servicio Sismológico Nacional, 2025 ). The earthquake was generated by a rupture with a normalfault mechanism lasting approximately 2.50 s, with a 91% double-couple component, within the subducted portion of the Cocos Plate beneath the North American Plate (U.S. Geological Survey, 2025 ). The moment-tensor solution computed by the Servicio Sismológico Nacional indicates that the rupture geometry was characterized by a strike of 80.7°, a dip of 67.8°, and a rake of − 110.9° (Fig. 2; Servicio Sismológico Nacional, 2025 ). At 02:33:01 local time, the Mexican Seismic Alert System (SASMEX), operated by the Centro de Instrumentación y Registro Sísmico A.C. (CIRES A.C.), detected the earthquake via seismic station 43206 “El Duin,” located 30 km southeast of Aquila, Michoacán; subsequently, another 20 sensors recorded the event’s propagation. At 02:33:07 local time, SASMEX issued a public alert for Mexico City, Chilpancingo, Acapulco, Oaxaca, Morelia, Colima, Puebla, Cuernavaca, and Toluca. In the specific case of Mexico City, the metropolitan area received the warning 108 seconds before the arrival of the secondary (S) wave (Fig. 3; Centro de Instrumentación y Registro Sísmico, 2025 ). The Mexico City Accelerographic Network (MCAN), also operated by CIRES A.C., is a system of accelerographs distributed throughout the urban area of Mexico City. It comprises 81 stations, of which seven belong to the Digital Accelerometric System for Structures (DASS) and eight are installed within boreholes at various depths. For the seismic event analyzed in this paper, MCAN recorded, at ground level, a maximum peak spectral acceleration of 6.23 cm/s² and a minimum peak spectral acceleration of 0.45 cm/s². These values were obtained from the acceleration time histories published by CIRES A.C. personnel, without baseline correction or frequency filtering (Fig. 4; Centro de Instrumentación y Registro Sísmico, n.d.). In the preliminary report on ground‑motion parameters by the Instituto de Ingeniería of the Universidad Nacional Autónoma de México (II‑UNAM), the accelerographic records were obtained from seismic stations located at radial distances between 77 km and 1,241 km from the earthquake epicenter, which together comprise the II‑UNAM Accelerographic Network (Fig. 5). The highest spectral acceleration recorded by the network was measured at the COMALA (COMA) station—99 km from the epicenter—with a value of 55.99 cm/s². In Mexico City, the maximum ground acceleration recorded at the Ciudad Universitaria station was 1.07 cm/s². These values result from analyses of acceleration time histories that were baseline‑corrected and band‑pass filtered between 0.1 Hz and 20 Hz on all three orthogonal components (Universidad Nacional Autónoma de México, Instituto de Geofísica, 2025 ). 4. Signal acquisition and processing For the construction of seismograms and response spectra, MiniSEED files containing acceleration and velocity records were obtained from six Raspberry Shake seismic stations located in the states of Michoacán, Colima, Jalisco, and Aguascalientes (Raspberry Shake, S.A., 2025). For Mexico City, accelerographic records from the MCAN network were used (Maricarmen Sánchez Pedroza, personal communication, January 27, 2025). Raspberry Shake S.A. is a Panamanian company, founded in 2016 in Chiriquí Province, that designs and manufactures “plug & play” seismic and infrasound stations based on Raspberry Pi hardware and a dataacquisition board integrating geophones, MEMS accelerometers, and—in some models—infrasound microphones. Its stations are classified into four main families: RS1D (singlechannel vertical geophone), RS3D (three orthogonal geophones for recording vertical and horizontal components), RS4D (vertical geophone plus a triaxial MEMS accelerometer for highamplitude events), and Raspberry Boom (RS&BOOM), which combines vertical seismic measurement with infrasound detection. Of the six Raspberry Shake stations, two are RS3D units and four are RS4D units. To obtain acceleration time histories from the RS3D stations, velocity records were first numerically differentiated in MATLAB, followed by baseline correction of the resulting acceleration histories (this baselinecorrection step was also applied to the velocity records of the RS3D stations prior to differentiation). The corrected recordings were then bandpass filtered to remove environmental noise (microseismicity). The baselinecorrection procedure consists of (1) computing the sampling interval, (2) performing a polynomial baseline fit, and (3) detrending (subtracting the fitted baseline). Next, an ideal bandpass (brickwall) filter was applied for the frequency range 0.1 Hz ≤ f ≤ 10 Hz. The filtering workflow entails (1) calculating the sampling frequency, (2) computing the discrete Fourier transform (FFT), (3) constructing the frequency vector, (4) defining the frequencydomain transfer function (mask), (5) applying the filter by multiplying spectra, and (6) reconstructing the filtered signal via the inverse FFT (IFFT). This brickwall filter is implemented as a rectangular window that passes only frequencies between the two cutoff values and completely attenuates all others (Hu & Lu, 2015 ; Trifunac, 1971 ). 4.1. Calculation of Velocities and Displacements In the same way as with the baselinecorrection and ideal bandpass filtering processes, velocitytime and displacementtime histories were computed in MATLAB from the accelerationtime histories by applying cumulative trapezoidal integration (for the RS3D stations, only displacement histories were derived from the velocity histories). To obtain the velocity at each time step, the continuous integral definition is used; similarly, applying the continuous integral to velocity yields displacement. In practice—and for numerical implementation in MATLAB—both continuous integrals are approximated discretely, by summing the areas of trapezoids between successive samples of the signal. At this stage, the acceleration (or velocity, as appropriate) values at two consecutive time points and the sampling interval between them are used. As a result of these successive integrations, the numerical displacement series tends to exhibit a zerolevel “drift,” which appears as a linear trend over time. To correct this, we model the drift with a straight line whose slope and intercept are determined by a leastsquares linear fit of the raw displacement series versus time. Once these two parameters are found, the corrected displacement series is generated by subtracting the estimated trend value at each time step. This procedure ensures that the resulting velocity and displacement histories are physically meaningful and free from undesirable cumulative offsets. The MATLAB code formulas for baseline correction, ideal bandpass filtering, and cumulative trapezoidal integration are provided in Section 1 of the Supplementary Material. 4.2. Rotation of accelerographic signals Seismographs measure ground motion in two orthogonal horizontal components (N–S and E–W) and one vertical component. By instrumenting two orthogonal components, it is possible to reconstruct vibration in any other direction within the horizontal plane. The geographic N–S and E–W axes are adopted because they are fixed, easy to reference and align in the field, and ensure global compatibility of records. However, the maximum ground acceleration during an earthquake may occur at any intermediate direction between these two axes. Thus, if the true direction of maximum vibration makes an angle θ different from 0° or 90°, its projections onto N–S and E–W will be a cos θ and a sin θ, both of which are less than the absolute value a. To find the true horizontal peak, the two horizontal components are rotated to obtain the 100th percentile of the rotated amplitudes (RotD100), since neither component alone necessarily captures the absolute maximum. In order to determine the maximum ground accelerations via RotD100 for this analysis, equations 1 through 7—based on Boore’s ( 2010 ) method for computing response spectra at all possible rotation angles—were applied. These equations were then implemented in MATLAB using an algorithm with the following steps: data loading → angle definition → conversion to radians → rotation and PGA computation → selection of the optimal angle. Data loading consists of extracting the time vectors (from sample i) and acceleration vectors (in sample i) in the orthogonal North and East directions. In the process, an angle vector angles(j) is generated, where j = 0°, 1°, 2°…, 90° with an increment of 1°. These values ​​are transformed into angles in radians, using Eq. ( 1 ): $$\:{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:{\theta\:}}_{\text{j}}=\:\frac{{\pi\:}}{180}\:\text{a}\text{n}\text{g}\text{l}\text{e}\text{s}\left(\text{j}\right)$$ 1 where: \(\:{{\theta\:}}_{\text{j}}\) = are the angles in the range 0° to 90° expressed in radians. Subsequently, the two orthogonal acceleration components are rotated by Eq. ( 2 ): $$\:{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\text{a}}_{\text{r}\text{o}\text{t},\text{i}}^{\left(\text{j}\right)}={\text{a}}_{\text{N},\text{i}}\text{cos}\left({{\theta\:}}_{\text{j}}\right)+\:{\text{a}}_{\text{E},\text{i}}\text{s}\text{i}\text{n}\left({{\theta\:}}_{\text{j}}\right)$$ 2 where: \(\:{\text{a}}_{\text{r}\text{o}\text{t},\text{i}}^{\left(\text{j}\right)}\) is the rotational acceleration at sample \(\:\text{i}\) for angle \(\:\text{j}\) . From the rotation of the accelerograms from 0° to 90°, the resulting acceleration peak is identified for each of the angles j, using Eq. ( 3 ): $$\:{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\text{P}\text{G}\text{A}}_{\text{j}}={\text{max}}_{1\le\:\text{i}\le\:\text{N}}\left|{\text{a}}_{\text{r}\text{o}\text{t},\text{i}}^{\left(\text{j}\right)}\right|$$ 3 where: \(\:{\text{P}\text{G}\text{A}}_{\text{j}}\:\) is the maximum absolute value of the rotational acceleration for angle \(\:\:\text{j}\) , and \(\:\text{m}\text{a}\text{x}\) is the maximum operator over index \(\:\text{i}\) . Once all the values ​​have been identified, the RotD100 value is identified using Eq. ( 4 ): $$\:{\text{P}\text{G}\text{A}}_{\text{R}\text{o}\text{t}\text{D}100}={\text{max}}_{{1\le\:\text{j}\le\:\text{n}}_{\text{Ang}}}{\text{P}\text{G}\text{A}}_{\text{j}}$$ 4 where: \(\:{\text{P}\text{G}\text{A}}_{\text{R}\text{o}\text{t}\text{D}100}\:\) is the RotD100 value, the largest of all \(\:{\text{P}\text{G}\text{A}}_{\text{j}}\) , and \(\:{\text{m}\text{a}\text{x}}_{{1\le\:\text{j}\le\:\text{n}}_{\text{A}\text{n}\text{g}}}\:\) is the maximum operator over angle \(\:\text{j}\) . The index of the optimal angle, i.e. the index of the angle where the \(\:{\text{P}\text{G}\text{A}}_{\text{R}\text{o}\text{t}\text{D}100}\:\) value occurs, can be calculated using Eq. ( 5 ): $$\:\:\:\:\:{\text{j}}^{\text{*}}=\:{\text{arg}\text{m}\text{a}\text{x}}_{{1\le\:\text{j}\le\:\text{n}}_{\text{A}\text{n}\text{g}}}{\text{P}\text{G}\text{A}}_{\text{j}}$$ 5 where: \(\:{\text{j}}^{\text{*}}\) is the index of the angle that produces the \(\:{\text{P}\text{G}\text{A}}_{\text{R}\text{o}\text{t}\text{D}100}\:\) value, and \(\:{\text{arg}\text{m}\text{a}\text{x}}_{{1\le\:\text{j}\le\:\text{n}}_{\text{A}\text{n}\text{g}}}\:\) is the operator that returns the index where the maximum is achieved. Using the value of the index \(\:{\text{j}}^{\text{*}}\) , the optimal angle in degrees is determined using Eq. ( 6 ): $$\:\:\:\:\:{{{\theta\:}}^{\text{*}}}_{\text{P}\text{G}\text{A}}=\text{a}\text{n}\text{g}\text{l}\text{e}\text{s}\left({\text{j}}^{\text{*}}\right)$$ 6 where: \(\:{{{\theta\:}}^{\text{*}}}_{\text{P}\text{G}\text{A}}\) is the optimal angle. The reconstruction of the optimal RotD100 accelerogram is carried out by implementing Eq. ( 7 ): $$\:\:\:\:\:{\text{a}}_{\text{R}\text{o}\text{t}\text{D}100}={\text{a}}_{\text{N},\text{i}}\text{cos}\left({{\theta\:}}^{\text{*}}\times\:\frac{{\pi\:}}{180}\right)+\:{\text{a}}_{\text{E},\text{i}}\text{sin}\left({{\theta\:}}^{\text{*}}\times\:\frac{{\pi\:}}{180}\right)\:$$ 7 where: \(\:{\text{a}}_{\text{R}\text{o}\text{t}\text{D}100}\:\) is the optimal rotated acceleration in sample \(\:\text{i}\) Using this procedure, the velocity-time and displacement-time histories at the optimal angles \(\:{{{\theta\:}}^{\text{*}}}_{\text{P}\text{G}\text{V}}\:\) and \(\:{{{\theta\:}}^{\text{*}}}_{\text{P}\text{G}\text{D}}\:\) can also be calculated, which produce the values ​​ \(\:{\:\text{P}\text{G}\text{V}}_{\text{R}\text{o}\text{t}\text{D}100}\:\) and \(\:{\text{P}\text{G}\text{D}}_{\text{R}\text{o}\text{t}\text{D}100}\) , respectively. 4.3. Calculation of the maximum response Using MATLAB software, the constantacceleration method (Newmark’s method) was implemented to construct pseudoacceleration, pseudovelocity, and displacement spectra for the three orthogonal components (N–S, E–W, vertical). For structuralresponse analysis and seismicresistant design, engineers are most interested in the maximum response. Therefore, just as with the seismographic signals, the horizontal response spectra were rotated from 0° to 90°—generating 91 spectra at each rotation angle—for structural periods T ranging from 0.0 s to 5.0 s in 0.1 s increments and a 5% critical damping ratio (ζ). The response spectra were derived from the baselinecorrected, bandpassfiltered signals (0.1 Hz to 10 Hz) to subsequently build response spectra over a structural period range of 0.1 s to 10 s (although periods from 5 s to 10 s are generally only considered in specific cases). There are two principal definitions for obtaining orientationindependent horizontal response spectra: (1) RotDnn, which computes direct percentiles (minimum, median, maximum) of spectra projected at multiple angles without using an intermediate geometric mean (Boore, 2010 ); and (2) GMRotI nn, which first takes the geometric mean of the two component spectra at each angle, then extracts percentiles (0, 50, 100%) from that series of means. However, using a geometric mean between components can introduce bias depending on the seismograph’s initial orientation, and the GMRotI100 value may not strictly equal the maximum RotD100 across all structural periods (Gül & Taşkın, 2021). For this analysis, the RotDnn method was implemented. This process was executed in MATLAB using a code developed by Dr. José Manuel Jara Guerrero, professor at the Facultad de Ingeniería Civil of the Universidad Michoacana de San Nicolás de Hidalgo (personal communication, June 2, 2022). It is important to clarify that the angle maximizing the instantaneous peak acceleration (groundlevel RotD100) does not necessarily coincide with the angle that maximizes the spectral pseudoacceleration of an oscillator at a given period (spectrum RotD100), because the former seeks the highest acceleration at any instant, while the latter optimizes the response of a dynamic system that filters and amplifies different frequency components according to its period and damping. Each structural period receives a distinct frequency content in the record, so the direction that produces the largest instantaneous peak rarely matches the direction that yields the greatest resonant response for all periods. Only if the real record behaved like a nearly pure singlefrequency wave—such that one angle would maximize both instantaneous amplitude and resonant response—could the two angles coincide, which is extraordinarily rare in practice due to the multiple frequency components present in accelerograms. Similarly, the angles that maximize peak velocity and displacement at ground level, as well as those that maximize pseudovelocity and pseudodisplacement for a given oscillator period, do not coincide with each other or with the angle that maximizes acceleration, because each measure is derived by a different operation on the original signal and is influenced by distinct aspects of its frequency and temporal content. Velocity relates to the time integration of acceleration and thus is dominated by lowerfrequency components, while displacement—being the second integral of the original signal—is even more so. Consequently, the direction yielding the highest value for each measure depends on the spatial combination of frequencies and phases and can vary significantly between measures. Regarding oscillator response, each pseudomeasure is computed with different operations on the filtered signal according to its period and damping: pseudoacceleration reflects the force the structure experiences; pseudovelocity relates to kinetic energy; and pseudodisplacement indicates how far the structure moves. Since each measure responds with different sensitivity to particular frequencies and phases, the angles that maximize them also tend to differ—especially in complex, realworld signals where multiple vibration modes and unsynchronized phases coexist. In summary, we have that: $$\:\:\:\:\:\:\:\:\:\:\:{{\theta\:}}_{\text{P}\text{G}\text{A}}^{\text{*}}\ne\:{{\theta\:}}_{\text{P}\text{G}\text{V}}^{\text{*}}\ne\:{{\theta\:}}_{\text{P}\text{G}\text{D}}^{\text{*}}\ne\:{{\theta\:}}_{\text{S}\text{A}}^{\text{*}}\left(\text{T}\right)\ne\:{{\theta\:}}_{\text{S}\text{V}}^{\text{*}}\left(\text{T}\right)\ne\:{{\theta\:}}_{\text{D}}^{\text{*}}\left(\text{T}\right)\:$$ 8 where: \(\:{{\theta\:}}_{\text{P}\text{G}\text{A}}^{\text{*}}\) , \(\:{{\theta\:}}_{\text{P}\text{G}\text{V}}^{\text{*}}\) and \(\:{{\theta\:}}_{\text{P}\text{G}\text{D}}^{\text{*}}\) are the optimal angles that produce the RotD100 values ​​of the maximum instantaneous accelerations, velocities, and displacements, respectively, at ground level, and, \(\:{{\theta\:}}_{\text{S}\text{A}}^{\text{*}}\left(\text{T}\right)\) , \(\:{{\theta\:}}_{\text{S}\text{V}}^{\text{*}}\left(\text{T}\right)\) and \(\:{{\theta\:}}_{\text{D}}^{\text{*}}\left(\text{T}\right)\) , are the optimal angles that produce the RotD100 values ​​of the maximum instantaneous accelerations, velocities, and displacements, respectively, for the structural period that experienced the greatest amplitude for each kinematic magnitude. Based on the physical and mathematical framework described above, it can likewise be inferred that the RotD0 and RotD50 values for each kinematic measure in the response spectra occur at rotation angles that differ both from each other and from the RotD100 angles at ground level and at the structural period yielding the largest pseudoacceleration, pseudovelocity, and displacement amplitudes. In this analysis, we will not adopt specific notation to denote the optimal angles that produce the RotD0 and RotD50 values; rather, we will simply list the maximum amplitudes of the three kinematic measures for these two rotation components of the accelerographic signals. 5. Results The data from the Raspberry Shake seismic stations and from the Mexico City Accelerographic Network are presented in Tables 1 and 2 . Using the coordinates of each station, the maps in Figs. 6 and 7 were created to illustrate the geographic distribution of the seismographic instruments. In the map of Fig. 7, the locations of the MCAN stations are shown over the geotechnical zoning of Mexico City, as published by the Secretariat of Comprehensive Risk Management and Civil Protection of the Mexican capital. Table 1 Data from the Raspberry seismic stations (Raspberry Shake, S.A., 2025) Station Type Latitude Longitude Location R6897 RS4D 18.27027 -103.34578 Maruata, Michoacán R457D RS4D 19.27928 -103.72025 Villa de Álvarez, Colima R3949 RS3D 19.51351 -102.41833 Peribán de Ramos, Michoacán R05D8 RS4D 19.75676 -104.35214 Autlán de Navarro, Jalisco R00E0 RS3D 19.66667 -101.23383 Morelia, Michoacán RC3FD RS4D 21.85586 -102.30009 Aguascalientes, Aguascalientes Table 2 Data from the M CAN stations (Maricarmen Sánchez Pedroza, personal comunication, January 27, 2025) Station Name Latitude Longitude Location AE02 Esc. Prim. "González Garzón" 19.4290 -99.0584 Aeropuerto, Zona Norte AL01 Alameda 19.4356 -99.1453 Alameda Central AO24 Alberca Olímpica 19.3580 -99.1539 Río Churubusco y División del Norte AP68 Jardín de Niños "Juan B.de la Salle" 19.3809 -99.1068 Apatlaco y San Lorenzo AR14 Esc. Prim. José Ordaz 19.4808 -99.0760 López Puebla 2 y Providencia AU11 Autódromo 19.3919 -99.0869 Autódromo Ricardo Rodríguez AU46 Esc. Sec. Téc. No. 14 19.3832 -99.1681 Ángel Urraza y Coyoacán BA49 Buenos Aires 19.4097 -99.1450 Esc. Sec. No. 102 BL45 Balderas 19.4253 -99.1481 Esc. Prim. Centro Revolución BO39 Bondojito 19.4653 -99.1047 Esc. Prim. Miguel Lanz Duret CA59 Candelaria 19.4258 -99.1183 Deportivo Venustiano Carranza CE23 CETIS 19.4619 -99.0642 CETIS No. 54 CE32 CETIS No. 57 19.3858 -99.0537 Av. Tepalcates y Verduzco CH84 Esc. Prim. "L. Portillo" 19.3300 -99.1254 W. Culhuacán CI05 Cibeles 19.4186 -99.1653 Esc. Prim. Alberto Correa CJ03 Centro Urbano Juárez 19.4097 -99.1567 Antonio M. Anza y Orizaba, Col. Roma CJ04 Multifamiliar Juárez II 19.4098 -99.1566 Antonio M. Anza y Orizaba, Col. Roma CO47 Coyoacán 19.3714 -99.1703 Esc. Prim. Centro Escolar Alemán CO56 Esc. Sec. Téc. No. 18 19.4215 -99.1590 Córdoba No. 68, Col. Roma CP28 Cerro del Peñón 19.4385 -99.0839 Peñón de los Baños CS66 CDAO 19.3728 -99.0983 Central de Abastos CS78 Esc. Sec. Téc. No. 43 19.3656 -99.2262 Colinas del Sur CT64 Cerro del Tepeyac 19.4876 -99.1137 M. Salas y Cantera CU80 Esc. Prim. "R. López Velarde" 19.2938 -99.1037 Periférico Sur, Cuemanco DM12 Deportivo Moctezuma 19.4312 -99.0963 Oriente 168 y Norte 25 DR16 DR16 Deportivo Reynosa 19.5005 -99.1829 Azcapotzalco Eje 5 Norte y San Pablo DX37 Xotepingo 19.3322 -99.1439 D. G. C. O. H. EO30 Parque Esparza Oteo 19.3885 -99.1772 Pensylvania y Georgia ES57 Escandón 19.4017 -99.1775 Esc. Prim. Miguel F. Martínez FJ74 Fundación Javier Barros Sierra 19.2990 -99.2100 Carretera al Ajusco, No. 203 GA62 Esc. Sec. Téc. No. 2 19.4385 -99.1401 Eje Central No. 10. Centro GC38 Jardín de Niños "Luz G. Campillo" 19.3161 -99.1059 Juana Medina y Guardería GR27 Granjas 19.4747 -99.1797 Esc. Sec. No. 55 HJ72 Hospital Juárez 19.4251 -99.1301 Jesús María, Centro IB22 Esc. Sec. Téc. No. 95 19.3450 -99.1297 Cerro Crestón y Cerro Mezontepec JA43 Jamaica 19.4053 -99.1250 Centro Cultural José Ma. Pino Zuárez JC54 Parque Jardines de Coyoacán 19.3130 -99.1272 Dalias e Iris LI33 LICONSA 19.3064 -98.9631 Planta LICONSA Tláhuac LI58 Esc. Sec. Dna. No. 23 19.4263 -99.1569 Liverpool No. 40, Col. Juárez LV17 Lindavista 19.4931 -99.1275 Parque Deportivo Av. Lindavista ME52 Esc. Sec. Téc. "Rafael Dondé" 19.4383 -99.1820 Mariano Escobedo y Lago Alberto MT50 Mariscal Tito 19.4253 -99.1900 Reforma y Gandhi MY19 Meyehualco 19.3461 -99.0433 Deportivo Santa Cruz Meyehualco NZ20 Nezahualcóyotl 19.4027 -99.0000 Deportivo Neza - IMSS NZ31 Nezahualcóyotl 19.4167 -99.0247 Esc. Normal ENEM No. 52 PA34 Esc. Prim. "Álvaro Obregón" 19.2016 -99.0491 San Pedro Atocpan PD42 Palacio de los Deportes 19.4055 -99.0997 Río Churubusco y Añil PE10 Esc. Prim. "Plutarco Elías Calles" 19.3800 -99.1318 P. Elías Calles y Santiago RI76 República de Italia 19.4473 -99.1000 Bolivares y Carlos Marx RM48 Esc. Prim. "Rodolfo Menéndez" 19.4359 -99.1280 Loreto y San Ildefonso SI53 San Simón 19.3753 -99.1483 Esc. Prim. Pedro Ascencio SP51 Sector popular 19.3656 -99.1189 Esc. Prim. Alberto Mazferrer SS60 SCT-CENDI-SEDESOL 19.3930 -99.1470 Xola y Universidad TH35 Tláhuac 19.2786 -99.0000 Esc. Prim. Antonio Caso TL08 Deportivo Antonio Caso T-II 19.4500 -99.1336 Nonoalco - Tlatelolco TL55 Tlatelolco 19.4536 -99.1425 Deportivo 5 de Mayo TP13 Tlalpan 19.2922 -99.1708 Esc. Prim. 1ro. de Mayo UC44 Unidad Colonia IMSS 19.4337 -99.1654 Villalongin No. 117 UI21 U. Iberoamericana 19.3700 -99.2642 Universidad Iberoamericana VG09 Valle Gómez 19.4539 -99.1225 Esc. Sec. No. 104 VM29 Villa del Mar 19.3811 -99.1253 Jardín de Niños Valentín Z. Orozco XO36 Jardín de Niños "Xochimilco" 19.2711 -99.1024 Club España y Chicoco XP06 Jardín de Niños "Xochipilli" 19.4198 -99.1353 5 de Febrero y Lucas Alamán, Centro 5.1. Maximum amplitudes and responses Tables 3 and 4 present the PGA RotD100 values on the horizontal component \(\:{{\theta\:}}_{\text{P}\text{G}\text{A}}^{\text{*}}\) , as well as the PSA RotD100 values on the horizontal component \(\:{{\theta\:}}_{\text{S}\text{A}}^{\text{*}}\left(\text{T}\right)\:\) and the structural period that experienced the greatest dynamic amplification, for each Raspberry Shake seismic station and for the Mexico City Accelerographic Network. Table 3 Maximum RotD100 accelerations and pseudo-accelerations on the Raspberry Shake stations Station Epicentral Distance (km) PGA (cm/s 2 ) PSA (cm/s 2 ) T (s) R6897 29.86 72.13 259.40 0.4 R457D 90.15 22.52 70.21 0.8 R3949 160.34 20.05 89.72 0.2 R05D8 166.39 6.65 29.73 0.8 R00E0 271.30 1.02 5.14 0.4 RC3FD 393.99 0.90 3.07 1.0 Table 4 Maximum RotD100 accelerations and pseudo-accelerations at the MCAN stations Estación Epicentral Distance (km) PGA (cm/s 2 ) PSA (cm/s 2 ) T (s) AE02 478.34 4.14 14.02 1.2 AL01 469.58 4.39 14.21 1.7 AO24 466.96 2.23 10.42 1.0 AP68 472.30 4.62 18.23 2.3 AR14 477.75 4.64 26.10 2.8 AU11 474.59 4.27 29.08 3.6 AU46 466.05 2.12 10.24 0.8 BA49 469.01 7.17 46.14 2.1 BL45 469.05 5.28 18.40 2.0 BO39 474.44 4.16 20.06 2.0 CA59 472.12 4.40 20.19 2.1 CE23 478.51 3.60 14.87 2.8 CE32 477.87 2.59 14.58 3.7 CH84 469.30 2.51 15.52 1.1 CI05 467.13 3.85 1.90 0.7 CJ03 467.81 3.76 16.38 1.9 CJ04 467.83 3.77 16.68 1.7 CO47 465.56 1.26 3.90 1.0 CO56 467.85 4.17 24.34 1.9 CP28 475.94 1.04 3.76 1.0 CS66 473.00 5.11 35.11 5.0 CS78 459.68 0.90 2.65 1.0 CT64 474.06 0.41 1.33 1.1 CU80 470.82 5.68 28.22 1.1 DM12 474.50 4.67 33.24 2.8 DR16 467.31 1.90 9.12 0.6 DX37 467.44 3.08 14.21 0.9 EO30 465.23 1.35 4.10 0.6 ES57 465.50 1.35 10.29 0.8 FJ74 459.94 1.10 4.08 1.00 GA62 470.18 4.44 18.78 1.80 GC38 471.03 3.50 22.57 1.50 GR27 467.00 2.54 11.04 0.70 HJ72 470.90 4.39 19.45 1.70 IB22 469.17 3.16 20.22 1.30 JA43 470.97 4.36 25.74 2.40 JC54 468.77 4.00 25.61 1.00 LI33 485.59 4.49 23.19 2.20 LI58 468.17 3.73 18.59 1.90 LV17 472.79 4.14 14.77 1.00 ME52 465.88 2.28 10.30 0.70 MT50 464.76 1.64 5.64 0.70 MY19 478.10 3.61 17.44 2.10 NZ20 483.76 4.22 15.58 1.80 NZ31 481.53 3.51 15.75 4.60 PA34 474.78 1.38 6.10 1.00 PD42 473.57 4.66 30.31 3.50 PE10 469.71 3.42 14.86 2.00 RI76 474.50 3.34 17.98 2.90 RM48 471.36 3.16 14.67 1.90 SI53 467.91 2.69 16.85 1.10 SP51 470.72 5.35 25.77 1.80 SS60 468.43 3.81 16.78 3.10 TH35 481.25 5.38 20.81 3.40 TL08 471.12 3.18 17.43 1.70 TL55 470.29 2.72 11.80 1.50 TP13 463.85 1.15 5.01 1.00 UC44 467.48 2.92 10.97 1.20 UI21 455.88 1.34 4.86 0.70 VG09 472.35 3.80 18.28 2.00 VM29 470.40 5.34 30.34 2.20 XO36 470.51 5.88 29.46 3.20 XP06 470.24 5.13 22.16 2.00 In Section 2 of the Supplementary Material, for the Raspberry Shake and MCAN seismic stations, Tables T1 through T6 present the maximum accelerations, velocities, and displacements recorded on the three orthogonal components; Tables T7 and T8 show the RotD100 values for the maximum accelerations, velocities, and displacements at the optimal rotation angles for each kinematic measure; Tables T9 through T14 list the peak pseudoaccelerations, pseudovelocities, and pseudodisplacements on the three orthogonal components for the structural periods that experienced the greatest dynamic amplification; and Tables T15 through T20 provide the pseudoaccelerations, pseudovelocities, and pseudodisplacements for the structural periods with the highest dynamic amplification at the rotation angles that yield the RotD100, RotD50, and RotD0 values for each kinematic measure. 5.2. Seismograms and response spectra The seismogram and response‑spectrum calculations were performed for the six Raspberry Shake seismic stations and for each of the 63 accelerographs of the Mexico City Accelerographic Network (MCAN) that recorded the earthquake in Mexico City. Consequently, a supplementary document was produced in which all seismograms and response spectra were published. For the RotD100 component of the horizontal accelerographic records, velocity and displacement time histories were also computed. 5.2.1. Raspberry Shake Seismic Stations Figure 8 shows the acceleration time history on component \(\:{{\theta\:}}_{\text{P}\text{G}\text{A}}^{\text{*}}\) , where the RotD100 value of the horizontal accelerations was produced at station R6897, located in Maruata, Michoacán. In Figure F1 of Section 3 of the Supplementary Material, the acceleration time history is shown along with the corresponding velocity and displacement time histories, each at their respective optimal rotation angles where the RotD100 values of each kinematic measure are generated. Figure 9 shows the pseudo-acceleration spectra for the three orthogonal components, and Fig. 10 presents the rotated spectra of pseudo-acceleration, pseudo-velocity, and displacement corresponding to the components where the RotD0, RotD50, and RotD100 values of each horizontal kinematic measure were produced, as well as the 91 response spectra across rotation angles from 0° to 90°, at station R6897, located in Maruata, Michoacán. Figure 11 shows the 91 pseudoacceleration spectra at the rotation angle 0°-90° for stations R457D, R3949, R05D8, R00E0 and RC3FD. The response spectra for the three orthogonal components are shown in Figures F8 to F13 of section 4.1.1 of the supplementary material, and the RotD0, 50 and 100 response spectra, and the 91 response spectra at the 0°-90° rotation angle for the Raspberry Shake stations are shown in Figures F77 to F82 of section 4.2.1 of the same document. 5.2.2. MCAN seismic stations Figure 12 shows the acceleration time histories on component \(\:{{\theta\:}}_{\text{P}\text{G}\text{A}}^{\text{*}}\) , where the RotD100 values were produced at the MCAN seismic stations that recorded the highest amplitudes in each geotechnical zone of Mexico City. Figures F2 through F7 in Section 3 of the Supplementary Material present the acceleration time histories along with the corresponding velocity and displacement time histories for these six accelerographic stations. Figure 13 shows the horizontal RotD100 pseudo-acceleration spectra on component \(\:{{\theta\:}}_{\text{S}\text{A}}^{\text{*}}\left(\text{T}\right)\) of each MCAN seismic station, grouped by geotechnical zone of Mexico City. Figure 14a shows the 91 pseudoacceleration spectra from MCAN station BA49, an accelerograph in which the highest pseudoacceleration occurred in its maximum RotD100 envelope, with a value of 46.14 cm/s 2 for the structural period of 2.1 seconds. Figure 14b shows the 91 pseudoacceleration spectra from MCAN station CS66, an accelerograph in which the maximum pseudoacceleration in the RotD100 envelope occurred for the structural period of 5.0 seconds with a value of 34.42 cm/s 2 . Figures F14 to F76 in section 4.1.2 of the supplementary material show the response spectra for the three orthogonal components, and Figures F83 to F145 in section 4.2.2 of the same document show the RotD0, 50 and 100 response spectra, and the 91 response spectra at the 0°-90° rotation angle for the stations of the Mexico City Accelerographic Network. 6. Maps of seismic accelerations in Mexico City In order to understand the distribution of ground level accelerations and pseudo seismic accelerations in Mexico City, maps were generated showing, every 0.5 seconds of structural period in the urban area of ​​Mexico City, the dispersion of accelerations and pseudo accelerations, by performing an interpolation using the Kriging method using the ArcGIS version 10.8.2 program. Figure 15 shows the map of the maximum seismic accelerations at ground level at the optimal angle that produces the RotD100 value, and Fig. 16 shows an isoacceleration map generated from the information in the previous map, whose equal acceleration curves were placed on the geotechnical zoning layer of Mexico City. Figure 17 shows the pseudoacceleration distribution map corresponding to the structural period T = 2.1 seconds, and Fig. 18 shows the pseudoacceleration contour map for the same structural period. The seismic pseudoacceleration maps are shown in Figures F146 to F156 of section 5.1 of the supplementary material, and the contours corresponding to the pseudoacceleration maps are shown in Figs. 157 to 156 in section 5.2 of the same document, juxtaposed over the geotechnical zoning of Mexico City. The maximum interpolated pseudoacceleration values ​​are associated with the envelope of the RotD100 pseudoacceleration spectrum of each MCAN accelerograph in the \(\:{{\theta\:}}_{\text{S}\text{A}}^{\text{*}}\left(\text{T}\right)\:\) component. 7. Description of structural and non-structural damage in homes The magnitude 6.1 earthquake recorded in Coalcomán, Michoacán, caused light structural and non-structural damage to various civil works in southeastern Michoacán and in Colima. Minor damage was reported in homes and public buildings in the municipalities of Coalcomán and Chinicuila, Michoacán, including cracks in slabs, detachment of tiles and plaster, as well as fissures in adobe walls. Damage was also reported in the municipal hall and the main church of Chinicuila, with minor cracking and detachment. Minor landslides occurred on the Colima–Manzanillo highway and on Federal Coastal Highway 200, affecting slopes and hillsides, which required cleanup and material removal by the authorities. Despite multiple aftershocks following the earthquake, no casualties or major damage to other critical infrastructure—such as schools or archaeological sites—were reported (Arrieta, 2025 ; Delgadillo & Guzmán, 2025 ; Región LC, 2025 ; Quadratín Michoacán, 2025). This section provides a brief description of structural and non-structural damage elements observed in dwellings and discusses possible damage mechanisms triggered by the seismic motion, based on photographs sent to the author of this article by residents in the municipalities of Michoacán and Colima near the epicentral region. The photographs are shown in Figs. 19 through 23. Figure 19 shows masonry walls composed of cement partition walls covered with plaster or render (surface finish) or with earth blocks (adobe) or a mixture of compacted earth with straw and other additives, covered with plaster or render; they function as load-bearing or enclosing walls, depending on the structural configuration of the house. The interior render or render consists of a mortar mixture (lime, cement, or gypsum) applied to the surface of the adobe to smooth and protect the wall, and is subsequently painted; it is partially detached, exposing the adobe structure, with cracks and areas of total or partial detachment. The sheet metal roof with a steel structure consists of a roof with corrugated metal sheets (possibly galvanized steel) supported by metal elements (beams or corrugated iron beams) painted green, suggesting that it is an added or adapted structure. It provides protection against the elements, and the way in which its covering is connected to the walls (anchors) influences the seismic behavior of the building. Partial detachment of the finish manifests itself in a considerably large area where the plaster and paint on both walls have come off, leaving the wall exposed. This is due to the pounding and vibration during the earthquake, which exceeds the plaster's adhesion capacity, and the lack of mechanical bonds (mesh or similar) between the adobe and the plaster, since the plaster, being more rigid, does not accompany the deformation of the adobe during the earthquake and cracks or comes off. Figure 20 shows a masonry wall, on the interior panel, covered with a render and paint, possibly over masonry (brick, block, or adobe), whose texture and thickness suggest a cement or lime render with paint applied to the surface. If it is load-bearing masonry, it forms part of the building's vertical load-bearing and lateral resistance system, and if it is an enclosing wall, its primary function is dividing, although it may contribute to overall stability. In the upper left part of the image, an opening (window or vent) with a light-filtering curtain can be seen. This represents a critical point by reducing the wall's load-bearing section and concentrating stresses at the corners. The render or plaster shows fissures, flaking, or fine cracks that could cause partial detachment over time due to seismic vibrations that exceed the deformation capacity of the finish and changes in humidity or temperature combined with deficient adhesion of the render. In addition, hairline or shrinkage cracks and thin, superficial cracks are observed in the paint and the finishing layer, especially if the plaster mix was not properly proportioned. These cracks are due to the shrinkage of the mortar upon drying and the lack of control joints or embedded reinforcement mesh. Seismic shaking accentuates these cracks, making them more visible. Figure 20 shows a masonry wall, on the interior wall, covered with plaster and paint, possibly over masonry (brick, block, or adobe), whose texture and thickness suggest a cement or lime plaster with paint applied to the surface. If it is load-bearing masonry, it forms part of the building's vertical load-bearing and lateral resistance system. If it is an enclosing wall, its primary function is to divide, although it may contribute to overall stability. In the upper left corner of the image, an opening (window or vent) with a light-filtering curtain can be seen. This represents a critical point, reducing the wall's load-bearing cross-section and concentrating stresses at the corners. The plaster or render exhibits fissures, flaking, or fine cracks that could cause partial detachment over time due to seismic vibrations that exceed the finish's deformation capacity and changes in humidity or temperature combined with poor plaster adhesion. In addition, capillary or shrinkage cracks, thin and superficial cracks, are observed in the paint and finish coat, especially if the plaster mix was not properly proportioned. These cracks are due to the shrinkage of the mortar upon drying and the lack of control joints or embedded reinforcing mesh. The seismic movement accentuates these cracks, making them more visible. Figure 22 shows a wall along its exterior, most likely made of masonry (partition or block) or reinforced concrete with a cement mortar plaster and paint on the surface. It shows a uniform finish. At the top, what appears to be a reinforced concrete slab can be seen, perhaps a cantilever or part of the floor or roof slab projecting outwards. At the bottom right, a glass enclosure can be seen, possibly a window or sliding French window with an aluminum or PVC frame. In load-bearing masonry walls, openings represent discontinuities that concentrate stresses at the corners. The image shows diagonal and horizontal cracks, including a main oblique crack with branches, indicative of shear stress due to horizontal forces during an earthquake, especially in walls without adequate reinforcement, and of bending at the top of the wall when the slab or cantilever exerts lateral thrust or is poorly anchored. Likewise, discontinuities in windows or doors generate stress concentrations that propagate cracks. Figure 23 shows an exterior wall along its outer surface, probably made of masonry (brick, concrete block, or even adobe, depending on the area) covered with a plaster or mortar render and painted green. It probably functions as a perimeter wall or façade, providing enclosure and support if it is load-bearing. The plaster and paint finish, consisting of a layer of mortar or plaster, protects the masonry from the elements and improves its aesthetics, although it does not provide significant structural strength. An irregular horizontal crack can be seen crossing the surface of the plaster halfway up the wall. This could be due to non-structural damage limited to the finish or to structural damage if the crack is deep and crosses the masonry or the joints between construction elements. Around the crack, there are areas of less adherent plaster, which are susceptible to detachment as a result of seismic vibrations or thermal expansion and contraction, which produce microcracks in the finishing layer and encourage its separation from the substrate. 8. Conclusions The rotated accelerographic records (RotD100) reveal a highly significant variability in peak ground accelerations between stations, even within the same urban area of Mexico City. These variabilities is attributable to the interaction between the direction of incidence of elastic waves, local geology, and the rupture geometry of the fault. Within the Mexico City Accelerographic Network (MCAN), station BA49 (geotechnical zone IIIc) recorded the highest RotD100 pseudoacceleration (46.14 cm/s²) for a structural period of 2.1 s, with peak ground accelerations reaching 7.17 cm/s². In contrast, softer zones (IIId) exhibited comparatively lower amplification during this particular event. The rotated response spectra (RotDnn) demonstrate that the peaks of pseudoacceleration, pseudovelocity, or pseudodisplacement occur at different angles for each station and structural period, confirming that the direction maximizing the instantaneous acceleration does not necessarily coincide with the one that maximizes the spectral response across all periods, since each period filters specific frequency components. Kriging interpolation of ground-level RotD100 accelerations and pseudoaccelerations reveals a spatial distribution dependent on the structural period, with higher concentrations in parts of zone IIIc of Mexico City for T = 2.1 s. This challenges the assumption that geotechnical zoning always results in monotonic amplification, and highlights that intermediate zones may amplify more than the softest ones under specific frequency contents and wave incidence directions defined by rupture geometry. Although zone IIId is typically associated with greater amplification, in this moderate-magnitude, long-distance earthquake (~ 470 km), the dominant energy in relatively low frequencies (~ 2–5 s) resonated more effectively in zone IIIc. This was further enhanced by the incoming wave direction (strike ~ 80.7°, dip ~ 67.8°, rake ~–110.9°) and multiple refractions through the basin stratigraphy, while the softer soil of zone IIId shifted energy toward longer periods outside the dominant frequency band of the event. Consistently, RotD100 values exceeded the peaks of the orthogonal components (N–S, E–W), validating the RotDnn approach over methodologies such as GMRotI, which may underestimate demands. This spatial and angular variability underscores the essential role of signal rotation in accurately characterizing maximum seismic hazard, informing orientation-independent seismic design spectra, generating dynamic zonation maps by period, and, investigating the relationship between fault mechanism and local response. Consequently, it is recommended to systematically incorporate RotDnn rotations in accelerogram processing and spectrum construction, to develop maps for multiple structural periods, integrate rupture and basin propagation models, and update design codes with rotational parameters to capture realistic directional demands—maintaining rotated accelerogram collections for updating dynamic hazard maps, given that each event may display non-intuitive behavior relative to static zonations. References Arrieta C (2025) Sismo provoca daños a 25 viviendas en dos municipios de Michoacán [Earthquake causes damage to 25 homes in two municipalities of Michoacán]. El Universal. Retrieved May 26, 2025, from https://www.eluniversal.com.mx/estados/sismo-provoca-danos-a-25-viviendas-en-dos-municipios-de-michoacan/ Boore DM (2010) Orientation-independent, nongeometric-mean measures of seismic intensity from two horizontal components of motion. 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Retrieved January 26, 2025, from https://earthquake.usgs.gov/earthquakes/eventpage/us6000pjig/executive Universidad Nacional Autónoma de México, Instituto de Geofísica (2025) Reporte preliminar UIS-II UNAM: Sismo de magnitud 6.1 – Michoacán, México [Preliminary report UIS-II UNAM: Magnitude 6.1 earthquake – Michoacán, Mexico] [PDF]. Retrieved January 26, 2025, from https://www.uis.unam.mx/PDF/UIS-IIUNAM_rep_prelim_20250112_023250_MICH_M6_1.pdf Additional Declarations The authors declare no competing interests. Supplementary Files SupplementaryMaterial.pdf Supplementary Material Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. 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Arévalo","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA2UlEQVRIiWNgGAWjYBACNvmHjQ8+8Ngw8AM5BxgbiNDCx5DcbDhDJo1BsoFYLXIM6W3SPDaHGQwOAHlEaWFjONhswJOTZrf5RnbigZ87GKLBevFqYWxsfCBxxiZ5243cDQd7zzDkziRkExszY7OBYU9ashlQy2HGNobcfoIOY2Nsk0j8dzjZeAZUSxtBLTxALQd4DtsZSBBtiwRjs2EDT1qCxJm3QL+0SRD2i/wM9oeP//DY2PO3527+8LPNJnfDAULWQEEi1GwJItUDgT3xSkfBKBgFo2DEAQDLkkbQiKE24QAAAABJRU5ErkJggg==","orcid":"","institution":"Universidad Michoacana de San Nicolás de Hidalgo","correspondingAuthor":true,"prefix":"","firstName":"Elí","middleName":"Daniel Almanza","lastName":"Arévalo","suffix":""}],"badges":[],"createdAt":"2025-06-18 23:42:28","currentVersionCode":1,"declarations":{"humanSubjects":false,"vertebrateSubjects":false,"conflictsOfInterestStatement":false,"humanSubjectEthicalGuidelines":false,"humanSubjectConsent":false,"humanSubjectClinicalTrial":false,"humanSubjectCaseReport":false,"vertebrateSubjectEthicalGuidelines":false},"doi":"10.21203/rs.3.rs-6926239/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6926239/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":85019703,"identity":"7ae1f18a-78ff-4eb0-bd2a-230b38ce79f6","added_by":"auto","created_at":"2025-06-20 04:22:50","extension":"jpg","order_by":1,"title":"Figure 1","display":"","copyAsset":false,"role":"figure","size":411985,"visible":true,"origin":"","legend":"\u003cp\u003eMap of tectonic plates in Mexico (INEGI, 2021)\u003c/p\u003e","description":"","filename":"Figura1.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/47b49a6d7d8993bbfe2091d0.jpg"},{"id":85019489,"identity":"862cee7f-aac1-461e-9183-81d0dd7a3961","added_by":"auto","created_at":"2025-06-20 04:14:50","extension":"jpg","order_by":2,"title":"Figure 2","display":"","copyAsset":false,"role":"figure","size":121118,"visible":true,"origin":"","legend":"\u003cp\u003eLocation of the epicenter of the 6.1 M\u003csub\u003eW\u003c/sub\u003e\u0026nbsp;magnitude earthquake (Servicio Sismológico Nacional, 2025)\u003c/p\u003e","description":"","filename":"Figura2.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/93dbe779533c0dcda3e5b2fc.jpg"},{"id":85020117,"identity":"7f6dd01b-a486-49eb-8a3e-69a044a3b5f7","added_by":"auto","created_at":"2025-06-20 04:30:50","extension":"jpg","order_by":3,"title":"Figure 3","display":"","copyAsset":false,"role":"figure","size":49373,"visible":true,"origin":"","legend":"\u003cp\u003eLocation of the epicenter, sensors and alert dissemination centers activated by the 6.1 M\u003csub\u003eW\u003c/sub\u003e\u0026nbsp;magnitude earthquake (Seismic Instrumentation and Recording Center, 2025)\u003c/p\u003e","description":"","filename":"Figura3.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/9e0552983dcf5e9fa99b52f1.jpg"},{"id":85020119,"identity":"be6da072-19c5-4180-9e10-82c67d9efa01","added_by":"auto","created_at":"2025-06-20 04:30:50","extension":"jpg","order_by":4,"title":"Figure 4","display":"","copyAsset":false,"role":"figure","size":63492,"visible":true,"origin":"","legend":"\u003cp\u003eTime acceleration histories in the three orthogonal components of the MCAN station AE02 (Seismic Instrumentation and Recording Center, n.d.)\u003c/p\u003e","description":"","filename":"Figura4.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/bab39017c5cd1058014e0d5e.jpg"},{"id":85019495,"identity":"42c6484f-5f2f-4cfd-8bf8-1808ccf327b8","added_by":"auto","created_at":"2025-06-20 04:14:50","extension":"jpg","order_by":5,"title":"Figure 5","display":"","copyAsset":false,"role":"figure","size":77922,"visible":true,"origin":"","legend":"\u003cp\u003eMap of peak ground accelerations based on the II-UNAM Accelerographic Network (Universidad Nacional Autónoma de México, Instituto de Geofísica, 2025)\u003c/p\u003e","description":"","filename":"Figura5.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/ee34d635bbae95e997030030.jpg"},{"id":85019494,"identity":"99e69bbf-1404-48f8-9f3e-ec7363baa8b7","added_by":"auto","created_at":"2025-06-20 04:14:50","extension":"jpg","order_by":6,"title":"Figure 6","display":"","copyAsset":false,"role":"figure","size":172931,"visible":true,"origin":"","legend":"\u003cp\u003eLocation of the Raspberry Shake seismic stations\u003c/p\u003e","description":"","filename":"Figura6.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/ca53a9841b440a3fc1dbb5f8.jpg"},{"id":85019501,"identity":"ea26b534-6d67-4e3a-a2f1-51761301efdd","added_by":"auto","created_at":"2025-06-20 04:14:50","extension":"jpg","order_by":7,"title":"Figure 7","display":"","copyAsset":false,"role":"figure","size":132621,"visible":true,"origin":"","legend":"\u003cp\u003eLocation of the seismic stations of the Mexico City Accelerographic Network\u003c/p\u003e","description":"","filename":"Figura7.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/8a5f511b0581552aef2b6a0a.jpg"},{"id":85019709,"identity":"118e744e-678e-4061-be9a-11c4901a6c51","added_by":"auto","created_at":"2025-06-20 04:22:50","extension":"jpg","order_by":8,"title":"Figure 8","display":"","copyAsset":false,"role":"figure","size":31507,"visible":true,"origin":"","legend":"\u003cp\u003eAcceleration time history on component \u0026nbsp;at the Raspberry Shake R6897 station (Maruata, Michoacán).\u003c/p\u003e","description":"","filename":"Figura8.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/4f678627ed932d9f90d3af41.jpg"},{"id":85019506,"identity":"c4cc1923-dfc3-4762-87ee-040e91e17c1d","added_by":"auto","created_at":"2025-06-20 04:14:50","extension":"jpg","order_by":9,"title":"Figure 9","display":"","copyAsset":false,"role":"figure","size":59689,"visible":true,"origin":"","legend":"\u003cp\u003ePseudo acceleration spectra in the three orthogonal components for the Raspberry Shake R6897 station (Maruata, Michoacán).\u003c/p\u003e","description":"","filename":"Figura9.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/f623b369f6d72dea0d973d04.jpg"},{"id":85019508,"identity":"8efd9d08-1d5e-4994-b873-6da2007cadc9","added_by":"auto","created_at":"2025-06-20 04:14:51","extension":"jpg","order_by":10,"title":"Figure 10","display":"","copyAsset":false,"role":"figure","size":205740,"visible":true,"origin":"","legend":"\u003cp\u003eRotated response spectra for the Raspberry Shake R6897 station (Maruata, Michoacán).\u003c/p\u003e","description":"","filename":"Figura10.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/f6d571a247423c9ad7b18399.jpg"},{"id":85019498,"identity":"42a21fbb-e11e-4663-a309-84c68eaf8e19","added_by":"auto","created_at":"2025-06-20 04:14:50","extension":"jpg","order_by":11,"title":"Figure 11","display":"","copyAsset":false,"role":"figure","size":155828,"visible":true,"origin":"","legend":"\u003cp\u003eResponse spectra at the 0°–90° rotation angle. a) R457D (Villa de Álvarez, Colima); b) R3949 (Peribán de Ramos, Michoacán); c) R05D8 (Autlán de Navarro, Jalisco); d) R00E0 (Morelia, Michoacán); e) RC3FD (Aguascalientes, Aguas Calientes).\u003c/p\u003e","description":"","filename":"Figura11.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/d5bd4d67fea218bc1a7660fb.jpg"},{"id":85019517,"identity":"07d63a30-8111-40a8-90bf-e9f4a7226022","added_by":"auto","created_at":"2025-06-20 04:14:51","extension":"jpg","order_by":12,"title":"Figure 12","display":"","copyAsset":false,"role":"figure","size":95048,"visible":true,"origin":"","legend":"\u003cp\u003eAceleration time history. a) Station MT50, zone I; b) Station DX37, zone II; c) Station LI33, zone IIIa; d) Station SP51, zone IIIb; e) Station BA49, zone IIIc; f) Station TH35, zone IIId\u003c/p\u003e","description":"","filename":"Figura12.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/5d345fc1a00a863038912f44.jpg"},{"id":85019513,"identity":"27929bbf-a6ea-4781-878e-a9b410b41df4","added_by":"auto","created_at":"2025-06-20 04:14:51","extension":"jpg","order_by":13,"title":"Figure 13","display":"","copyAsset":false,"role":"figure","size":196083,"visible":true,"origin":"","legend":"\u003cp\u003eRotD100 horizontal pseudo-acceleration spectra. a) Zone I; b) Zone II; c) Zone IIIa; d) Zone IIIb; e) Zone IIIc; f) Zone IIId\u003c/p\u003e","description":"","filename":"Figura13.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/9ad0981efc4fd94583331038.jpg"},{"id":85020120,"identity":"0e9c1500-d99e-49f4-bff9-3e28a70a4275","added_by":"auto","created_at":"2025-06-20 04:30:50","extension":"jpg","order_by":14,"title":"Figure 14","display":"","copyAsset":false,"role":"figure","size":66544,"visible":true,"origin":"","legend":"\u003cp\u003eResponse spectra at the rotation angle 0°-90° at the accelerographic station a) BA49 and b) CS66\u003c/p\u003e","description":"","filename":"Figura14.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/ce3321ce290428b69046b814.jpg"},{"id":85019507,"identity":"32fdef9d-c3e0-41ac-a855-53d69e9c623a","added_by":"auto","created_at":"2025-06-20 04:14:50","extension":"jpg","order_by":15,"title":"Figure 15","display":"","copyAsset":false,"role":"figure","size":154886,"visible":true,"origin":"","legend":"\u003cp\u003eMap of maximum RotD100 accelerations at ground level in Mexico City\u003c/p\u003e","description":"","filename":"Figura15.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/658680409106e198502a59e9.jpg"},{"id":85019502,"identity":"1980d70b-71fb-4524-bfbe-7535b5febf35","added_by":"auto","created_at":"2025-06-20 04:14:50","extension":"jpg","order_by":16,"title":"Figure 16","display":"","copyAsset":false,"role":"figure","size":181158,"visible":true,"origin":"","legend":"\u003cp\u003eRotD100 acceleration contour map at ground level in Mexico City\u003c/p\u003e","description":"","filename":"Figura16.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/11312bcd9d8ddd6867ceadd5.jpg"},{"id":85019512,"identity":"f83f5f66-236a-4e9d-acd1-368d438870a3","added_by":"auto","created_at":"2025-06-20 04:14:51","extension":"jpg","order_by":17,"title":"Figure 17","display":"","copyAsset":false,"role":"figure","size":145693,"visible":true,"origin":"","legend":"\u003cp\u003eMap of RotD100 seismic pseudoaccelerations in Mexico City for the structural period of 2.1 seconds\u003c/p\u003e","description":"","filename":"Figura17.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/0d797a213fee2f7101333200.jpg"},{"id":85019711,"identity":"74d77945-2b86-4e3d-8db5-4e0815d599cd","added_by":"auto","created_at":"2025-06-20 04:22:51","extension":"jpg","order_by":18,"title":"Figure 18","display":"","copyAsset":false,"role":"figure","size":159681,"visible":true,"origin":"","legend":"\u003cp\u003eRotD100 pseudoacceleration contour map in Mexico City for the structural period of 2.1 seconds\u003c/p\u003e","description":"","filename":"Figura18.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/e5d08fe159fb51126092a77b.jpg"},{"id":85019514,"identity":"09616d74-7f3b-40fc-814d-87978c59e638","added_by":"auto","created_at":"2025-06-20 04:14:51","extension":"jpg","order_by":19,"title":"Figure 19","display":"","copyAsset":false,"role":"figure","size":76878,"visible":true,"origin":"","legend":"\u003cp\u003eDamage to brick and adobe masonry walls of a house (Eva Magaña/Courtesy)\u003c/p\u003e","description":"","filename":"Figura19.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/d59cd422caf1291fb068644b.jpg"},{"id":85019503,"identity":"080c6f6a-9d99-45a8-8ca2-b087f539b601","added_by":"auto","created_at":"2025-06-20 04:14:50","extension":"jpg","order_by":20,"title":"Figure 20","display":"","copyAsset":false,"role":"figure","size":51688,"visible":true,"origin":"","legend":"\u003cp\u003eDamage to interior finished masonry walls in a home (Nohemy Garcia / Courtesy)\u003c/p\u003e","description":"","filename":"Figura20.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/55fab6b61e34e5afad0d670b.jpg"},{"id":85019515,"identity":"173af5d5-b86e-483d-8415-81e2992ace35","added_by":"auto","created_at":"2025-06-20 04:14:51","extension":"jpg","order_by":21,"title":"Figure 21","display":"","copyAsset":false,"role":"figure","size":72170,"visible":true,"origin":"","legend":"\u003cp\u003eDamage to the external wall of a house (GT Fernández/Courtesy)\u003c/p\u003e","description":"","filename":"Figura21.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/5306756ae41093a703cf7bce.jpg"},{"id":85019509,"identity":"15df5e66-7f59-45e4-a47a-c43dde65ed72","added_by":"auto","created_at":"2025-06-20 04:14:51","extension":"jpg","order_by":22,"title":"Figure 22","display":"","copyAsset":false,"role":"figure","size":69606,"visible":true,"origin":"","legend":"\u003cp\u003eDamage to the external wall of a house (GT Fernández/Courtesy)\u003c/p\u003e","description":"","filename":"Figura22.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/523a984882777cf157b07543.jpg"},{"id":85019510,"identity":"9c7128d9-c607-4012-973a-90b49439376a","added_by":"auto","created_at":"2025-06-20 04:14:51","extension":"jpg","order_by":23,"title":"Figure 23","display":"","copyAsset":false,"role":"figure","size":48953,"visible":true,"origin":"","legend":"\u003cp\u003eDamage to the external wall of a house (GT Fernández/Courtesy)\u003c/p\u003e","description":"","filename":"Figura23.jpg","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/8db765b6a66379c3a73f128a.jpg"},{"id":85020455,"identity":"3425d546-c585-48d6-a4b7-89c0db913af1","added_by":"auto","created_at":"2025-06-20 04:38:53","extension":"pdf","order_by":0,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":4019965,"visible":true,"origin":"","legend":"","description":"","filename":"manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/55c41473-5957-4fc5-b650-9490a2c533b8.pdf"},{"id":85019712,"identity":"5a88faf5-2a90-4935-8e81-c50cb287a0fe","added_by":"auto","created_at":"2025-06-20 04:22:51","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"supplement","size":27044750,"visible":true,"origin":"","legend":"\u003cp\u003eSupplementary Material\u003c/p\u003e","description":"","filename":"SupplementaryMaterial.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6926239/v1/7b8b9394f9070825a50821dd.pdf"}],"financialInterests":"The authors declare no competing interests.","formattedTitle":"\u003cp\u003eThe 6.1 magnitude earthquake in Aquila, Michoacán on January 12, 2025\u003c/p\u003e","fulltext":[{"header":"1. Introduction","content":"\u003cp\u003eThe Michoac\u0026aacute;n seismogenic zone, part of the Mesoamerican trench, has historically generated large‑magnitude earthquakes. Although Pacific‑coast communities face high seismic hazard due to their proximity to subduction zones, Mexico City\u0026rsquo;s complex geology and wide range of natural vibration periods mean that its buildings can undergo dynamic amplification even from relatively low‑magnitude, distant events\u0026mdash;such as the M 6.1 M\u003csub\u003eW\u003c/sub\u003e earthquake that struck Aquila, Michoac\u0026aacute;n, on January 12, 2025. In this paper we summarize the earthquake\u0026rsquo;s key parameters and its impact on the official seismic‑alert system and local accelerographic networks; present the mathematical framework for computing the maximum horizontal accelerogram through rotation of the two orthogonal horizontal signals and for constructing horizontal response spectra at a 90\u0026deg; rotation angle; display seismograms and response spectra from stations that recorded the tremor; show acceleration and pseudo‑acceleration maps for Mexico City, and describe selected damage observed in municipalities near the epicenter.\u003c/p\u003e"},{"header":"2. Tectonic context","content":"\u003cp\u003eIn Mexico\u0026rsquo;s continental and oceanic territory, five tectonic plates interact: the North American Plate, the Pacific Plate, the Rivera Plate, the Cocos Plate, and the Caribbean Plate. Seismic hazard in Mexico is divided into four major zones\u0026mdash;A, B, C, and D (INEGI, 2021)\u0026mdash;based on the frequency of earthquake occurrence and the maximum ground acceleration expected over a century. Zone A has not experienced any significant earthquakes in the past 80 years, and ground accelerations are not expected to exceed 10% of g. In Zone D, which experiences frequent earthquakes (with ground accelerations often exceeding 70% of g) and a history of large events, has the highest hazard. Zones B and C are intermediate, with less frequent earthquakes and ground accelerations below 70% of g (Pe\u0026ntilde;a \u0026amp; Manzano, \u003cspan citationid=\"CR10\" class=\"CitationRef\"\u003e2015\u003c/span\u003e).\u003c/p\u003e \u003cp\u003eThe interaction between the Cocos and Rivera plates as they subduct beneath the North American Plate has given rise to mountain ranges in the country\u0026rsquo;s central and southern regions and to extensive geological fault systems. This interaction has historically generated large interplate and intraplate earthquakes. Intraplate events are due to geological faults that segment both the North American Plate and the subducted portion of the Cocos Plate. In the case of the earthquake analyzed in this paper, it was caused by the rupture of one of the faults fragmenting the Cocos Plate beneath the state of Michoac\u0026aacute;n de Ocampo; its mechanism is classified as normal (extensional) due to the stresses this tectonic slab experiences as it bends and descends into the Earth\u0026rsquo;s mantle. This geometry has been described in other studies through seismic tomography analyses (Ferrari et al., 2011).\u003c/p\u003e"},{"header":"3. Parameters of the seismic event","content":"\u003cp\u003eOn January 12, 2025, at 02:32:53 (UTC \u0026minus;\u0026thinsp;06:00) a magnitude 6.1 M\u003csub\u003eW\u003c/sub\u003e earthquake occurred (Servicio Sismol\u0026oacute;gico Nacional, \u003cspan citationid=\"CR14\" class=\"CitationRef\"\u003e2025\u003c/span\u003e), which the U.S. Geological Survey reported as a 6.2 M\u003csub\u003eWW\u003c/sub\u003e event\u0026mdash;equivalent to a seismic moment of 2.723 \u0026times; 10\u0026sup1;⁸ N\u0026middot;m (U.S. Geological Survey, \u003cspan citationid=\"CR17\" class=\"CitationRef\"\u003e2025\u003c/span\u003e). Its epicenter was located at 18.496\u0026deg; N, 103.499\u0026deg; W (47 km SW of Coalcom\u0026aacute;n de V\u0026aacute;zquez Pallares, Michoac\u0026aacute;n, Mexico), with a hypocentral depth of 30 km (Servicio Sismol\u0026oacute;gico Nacional, \u003cspan citationid=\"CR14\" class=\"CitationRef\"\u003e2025\u003c/span\u003e). The earthquake was generated by a rupture with a normalfault mechanism lasting approximately 2.50 s, with a 91% double-couple component, within the subducted portion of the Cocos Plate beneath the North American Plate (U.S. Geological Survey, \u003cspan citationid=\"CR17\" class=\"CitationRef\"\u003e2025\u003c/span\u003e). The moment-tensor solution computed by the Servicio Sismol\u0026oacute;gico Nacional indicates that the rupture geometry was characterized by a strike of 80.7\u0026deg;, a dip of 67.8\u0026deg;, and a rake of \u0026minus;\u0026thinsp;110.9\u0026deg; (Fig.\u0026nbsp;2; Servicio Sismol\u0026oacute;gico Nacional, \u003cspan citationid=\"CR14\" class=\"CitationRef\"\u003e2025\u003c/span\u003e).\u003c/p\u003e \u003cp\u003eAt 02:33:01 local time, the Mexican Seismic Alert System (SASMEX), operated by the Centro de Instrumentaci\u0026oacute;n y Registro S\u0026iacute;smico A.C. (CIRES A.C.), detected the earthquake via seismic station 43206 \u0026ldquo;El Duin,\u0026rdquo; located 30 km southeast of Aquila, Michoac\u0026aacute;n; subsequently, another 20 sensors recorded the event\u0026rsquo;s propagation. At 02:33:07 local time, SASMEX issued a public alert for Mexico City, Chilpancingo, Acapulco, Oaxaca, Morelia, Colima, Puebla, Cuernavaca, and Toluca. In the specific case of Mexico City, the metropolitan area received the warning 108 seconds before the arrival of the secondary (S) wave (Fig.\u0026nbsp;3; Centro de Instrumentaci\u0026oacute;n y Registro S\u0026iacute;smico, \u003cspan citationid=\"CR3\" class=\"CitationRef\"\u003e2025\u003c/span\u003e).\u003c/p\u003e \u003cp\u003eThe Mexico City Accelerographic Network (MCAN), also operated by CIRES A.C., is a system of accelerographs distributed throughout the urban area of Mexico City. It comprises 81 stations, of which seven belong to the Digital Accelerometric System for Structures (DASS) and eight are installed within boreholes at various depths. For the seismic event analyzed in this paper, MCAN recorded, at ground level, a maximum peak spectral acceleration of 6.23 cm/s\u0026sup2; and a minimum peak spectral acceleration of 0.45 cm/s\u0026sup2;. These values were obtained from the acceleration time histories published by CIRES A.C. personnel, without baseline correction or frequency filtering (Fig.\u0026nbsp;4; Centro de Instrumentaci\u0026oacute;n y Registro S\u0026iacute;smico, n.d.).\u003c/p\u003e \u003cp\u003eIn the preliminary report on ground‑motion parameters by the Instituto de Ingenier\u0026iacute;a of the Universidad Nacional Aut\u0026oacute;noma de M\u0026eacute;xico (II‑UNAM), the accelerographic records were obtained from seismic stations located at radial distances between 77 km and 1,241 km from the earthquake epicenter, which together comprise the II‑UNAM Accelerographic Network (Fig.\u0026nbsp;5). The highest spectral acceleration recorded by the network was measured at the COMALA (COMA) station\u0026mdash;99 km from the epicenter\u0026mdash;with a value of 55.99 cm/s\u0026sup2;. In Mexico City, the maximum ground acceleration recorded at the Ciudad Universitaria station was 1.07 cm/s\u0026sup2;. These values result from analyses of acceleration time histories that were baseline‑corrected and band‑pass filtered between 0.1 Hz and 20 Hz on all three orthogonal components (Universidad Nacional Aut\u0026oacute;noma de M\u0026eacute;xico, Instituto de Geof\u0026iacute;sica, \u003cspan citationid=\"CR18\" class=\"CitationRef\"\u003e2025\u003c/span\u003e).\u003c/p\u003e"},{"header":"4. Signal acquisition and processing","content":"\u003cp\u003eFor the construction of seismograms and response spectra, MiniSEED files containing acceleration and velocity records were obtained from six Raspberry Shake seismic stations located in the states of Michoac\u0026aacute;n, Colima, Jalisco, and Aguascalientes (Raspberry Shake, S.A., 2025). For Mexico City, accelerographic records from the MCAN network were used (Maricarmen S\u0026aacute;nchez Pedroza, personal communication, January 27, 2025).\u003c/p\u003e \u003cp\u003eRaspberry Shake S.A. is a Panamanian company, founded in 2016 in Chiriqu\u0026iacute; Province, that designs and manufactures \u0026ldquo;plug \u0026amp; play\u0026rdquo; seismic and infrasound stations based on Raspberry Pi hardware and a dataacquisition board integrating geophones, MEMS accelerometers, and\u0026mdash;in some models\u0026mdash;infrasound microphones. Its stations are classified into four main families: RS1D (singlechannel vertical geophone), RS3D (three orthogonal geophones for recording vertical and horizontal components), RS4D (vertical geophone plus a triaxial MEMS accelerometer for highamplitude events), and Raspberry Boom (RS\u0026amp;BOOM), which combines vertical seismic measurement with infrasound detection.\u003c/p\u003e \u003cp\u003eOf the six Raspberry Shake stations, two are RS3D units and four are RS4D units. To obtain acceleration time histories from the RS3D stations, velocity records were first numerically differentiated in MATLAB, followed by baseline correction of the resulting acceleration histories (this baselinecorrection step was also applied to the velocity records of the RS3D stations prior to differentiation). The corrected recordings were then bandpass filtered to remove environmental noise (microseismicity).\u003c/p\u003e \u003cp\u003eThe baselinecorrection procedure consists of (1) computing the sampling interval, (2) performing a polynomial baseline fit, and (3) detrending (subtracting the fitted baseline). Next, an ideal bandpass (brickwall) filter was applied for the frequency range 0.1 Hz\u0026thinsp;\u0026le;\u0026thinsp;f\u0026thinsp;\u0026le;\u0026thinsp;10 Hz. The filtering workflow entails (1) calculating the sampling frequency, (2) computing the discrete Fourier transform (FFT), (3) constructing the frequency vector, (4) defining the frequencydomain transfer function (mask), (5) applying the filter by multiplying spectra, and (6) reconstructing the filtered signal via the inverse FFT (IFFT). This brickwall filter is implemented as a rectangular window that passes only frequencies between the two cutoff values and completely attenuates all others (Hu \u0026amp; Lu, \u003cspan citationid=\"CR8\" class=\"CitationRef\"\u003e2015\u003c/span\u003e; Trifunac, \u003cspan citationid=\"CR16\" class=\"CitationRef\"\u003e1971\u003c/span\u003e).\u003c/p\u003e \u003cdiv id=\"Sec5\" class=\"Section2\"\u003e \u003ch2\u003e4.1. Calculation of Velocities and Displacements\u003c/h2\u003e \u003cp\u003eIn the same way as with the baselinecorrection and ideal bandpass filtering processes, velocitytime and displacementtime histories were computed in MATLAB from the accelerationtime histories by applying cumulative trapezoidal integration (for the RS3D stations, only displacement histories were derived from the velocity histories).\u003c/p\u003e \u003cp\u003eTo obtain the velocity at each time step, the continuous integral definition is used; similarly, applying the continuous integral to velocity yields displacement. In practice\u0026mdash;and for numerical implementation in MATLAB\u0026mdash;both continuous integrals are approximated discretely, by summing the areas of trapezoids between successive samples of the signal. At this stage, the acceleration (or velocity, as appropriate) values at two consecutive time points and the sampling interval between them are used.\u003c/p\u003e \u003cp\u003eAs a result of these successive integrations, the numerical displacement series tends to exhibit a zerolevel \u0026ldquo;drift,\u0026rdquo; which appears as a linear trend over time. To correct this, we model the drift with a straight line whose slope and intercept are determined by a leastsquares linear fit of the raw displacement series versus time. Once these two parameters are found, the corrected displacement series is generated by subtracting the estimated trend value at each time step. This procedure ensures that the resulting velocity and displacement histories are physically meaningful and free from undesirable cumulative offsets.\u003c/p\u003e \u003cp\u003eThe MATLAB code formulas for baseline correction, ideal bandpass filtering, and cumulative trapezoidal integration are provided in Section 1 of the Supplementary Material.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec6\" class=\"Section2\"\u003e \u003ch2\u003e4.2. Rotation of accelerographic signals\u003c/h2\u003e \u003cp\u003eSeismographs measure ground motion in two orthogonal horizontal components (N\u0026ndash;S and E\u0026ndash;W) and one vertical component. By instrumenting two orthogonal components, it is possible to reconstruct vibration in any other direction within the horizontal plane. The geographic N\u0026ndash;S and E\u0026ndash;W axes are adopted because they are fixed, easy to reference and align in the field, and ensure global compatibility of records. However, the maximum ground acceleration during an earthquake may occur at any intermediate direction between these two axes. Thus, if the true direction of maximum vibration makes an angle θ different from 0\u0026deg; or 90\u0026deg;, its projections onto N\u0026ndash;S and E\u0026ndash;W will be a cos θ and a sin θ, both of which are less than the absolute value a. To find the true horizontal peak, the two horizontal components are rotated to obtain the 100th percentile of the rotated amplitudes (RotD100), since neither component alone necessarily captures the absolute maximum.\u003c/p\u003e \u003cp\u003eIn order to determine the maximum ground accelerations via RotD100 for this analysis, equations \u003cspan refid=\"Equ1\" class=\"InternalRef\"\u003e1\u003c/span\u003e through 7\u0026mdash;based on Boore\u0026rsquo;s (\u003cspan citationid=\"CR2\" class=\"CitationRef\"\u003e2010\u003c/span\u003e) method for computing response spectra at all possible rotation angles\u0026mdash;were applied. These equations were then implemented in MATLAB using an algorithm with the following steps: data loading \u0026rarr; angle definition \u0026rarr; conversion to radians \u0026rarr; rotation and PGA computation \u0026rarr; selection of the optimal angle.\u003c/p\u003e \u003cp\u003eData loading consists of extracting the time vectors (from sample i) and acceleration vectors (in sample i) in the orthogonal North and East directions. In the process, an angle vector angles(j) is generated, where j\u0026thinsp;=\u0026thinsp;0\u0026deg;, 1\u0026deg;, 2\u0026deg;\u0026hellip;, 90\u0026deg; with an increment of 1\u0026deg;. These values ​​are transformed into angles in radians, using Eq.\u0026nbsp;(\u003cspan refid=\"Equ1\" class=\"InternalRef\"\u003e1\u003c/span\u003e):\u003cdiv id=\"Equ1\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equ1\" name=\"EquationSource\"\u003e\n$$\\:{\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:{\\theta\\:}}_{\\text{j}}=\\:\\frac{{\\pi\\:}}{180}\\:\\text{a}\\text{n}\\text{g}\\text{l}\\text{e}\\text{s}\\left(\\text{j}\\right)$$\u003c/div\u003e\u003cdiv class=\"EquationNumber\"\u003e1\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003ewhere:\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{j}}\\)\u003c/span\u003e \u003c/span\u003e = are the angles in the range 0\u0026deg; to 90\u0026deg; expressed in radians.\u003c/p\u003e \u003cp\u003eSubsequently, the two orthogonal acceleration components are rotated by Eq.\u0026nbsp;(\u003cspan refid=\"Equ2\" class=\"InternalRef\"\u003e2\u003c/span\u003e):\u003cdiv id=\"Equ2\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equ2\" name=\"EquationSource\"\u003e\n$$\\:{\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\text{a}}_{\\text{r}\\text{o}\\text{t},\\text{i}}^{\\left(\\text{j}\\right)}={\\text{a}}_{\\text{N},\\text{i}}\\text{cos}\\left({{\\theta\\:}}_{\\text{j}}\\right)+\\:{\\text{a}}_{\\text{E},\\text{i}}\\text{s}\\text{i}\\text{n}\\left({{\\theta\\:}}_{\\text{j}}\\right)$$\u003c/div\u003e\u003cdiv class=\"EquationNumber\"\u003e2\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003ewhere:\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{a}}_{\\text{r}\\text{o}\\text{t},\\text{i}}^{\\left(\\text{j}\\right)}\\)\u003c/span\u003e \u003c/span\u003e is the rotational acceleration at sample \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:\\text{i}\\)\u003c/span\u003e\u003c/span\u003e for angle \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:\\text{j}\\)\u003c/span\u003e\u003c/span\u003e.\u003c/p\u003e \u003cp\u003eFrom the rotation of the accelerograms from 0\u0026deg; to 90\u0026deg;, the resulting acceleration peak is identified for each of the angles j, using Eq.\u0026nbsp;(\u003cspan refid=\"Equ3\" class=\"InternalRef\"\u003e3\u003c/span\u003e):\u003cdiv id=\"Equ3\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equ3\" name=\"EquationSource\"\u003e\n$$\\:{\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\text{P}\\text{G}\\text{A}}_{\\text{j}}={\\text{max}}_{1\\le\\:\\text{i}\\le\\:\\text{N}}\\left|{\\text{a}}_{\\text{r}\\text{o}\\text{t},\\text{i}}^{\\left(\\text{j}\\right)}\\right|$$\u003c/div\u003e\u003cdiv class=\"EquationNumber\"\u003e3\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003ewhere:\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{P}\\text{G}\\text{A}}_{\\text{j}}\\:\\)\u003c/span\u003e \u003c/span\u003eis the maximum absolute value of the rotational acceleration for angle\u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:\\:\\text{j}\\)\u003c/span\u003e\u003c/span\u003e, and\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:\\text{m}\\text{a}\\text{x}\\)\u003c/span\u003e \u003c/span\u003e is the maximum operator over index \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:\\text{i}\\)\u003c/span\u003e\u003c/span\u003e.\u003c/p\u003e \u003cp\u003eOnce all the values ​​have been identified, the RotD100 value is identified using Eq.\u0026nbsp;(\u003cspan refid=\"Equ4\" class=\"InternalRef\"\u003e4\u003c/span\u003e):\u003cdiv id=\"Equ4\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equ4\" name=\"EquationSource\"\u003e\n$$\\:{\\text{P}\\text{G}\\text{A}}_{\\text{R}\\text{o}\\text{t}\\text{D}100}={\\text{max}}_{{1\\le\\:\\text{j}\\le\\:\\text{n}}_{\\text{Ang}}}{\\text{P}\\text{G}\\text{A}}_{\\text{j}}$$\u003c/div\u003e\u003cdiv class=\"EquationNumber\"\u003e4\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003ewhere:\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{P}\\text{G}\\text{A}}_{\\text{R}\\text{o}\\text{t}\\text{D}100}\\:\\)\u003c/span\u003e \u003c/span\u003eis the RotD100 value, the largest of all \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{P}\\text{G}\\text{A}}_{\\text{j}}\\)\u003c/span\u003e\u003c/span\u003e, and\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{m}\\text{a}\\text{x}}_{{1\\le\\:\\text{j}\\le\\:\\text{n}}_{\\text{A}\\text{n}\\text{g}}}\\:\\)\u003c/span\u003e \u003c/span\u003eis the maximum operator over angle \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:\\text{j}\\)\u003c/span\u003e\u003c/span\u003e.\u003c/p\u003e \u003cp\u003eThe index of the optimal angle, i.e. the index of the angle where the \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{P}\\text{G}\\text{A}}_{\\text{R}\\text{o}\\text{t}\\text{D}100}\\:\\)\u003c/span\u003e\u003c/span\u003evalue occurs, can be calculated using Eq.\u0026nbsp;(\u003cspan refid=\"Equ5\" class=\"InternalRef\"\u003e5\u003c/span\u003e):\u003cdiv id=\"Equ5\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equ5\" name=\"EquationSource\"\u003e\n$$\\:\\:\\:\\:\\:{\\text{j}}^{\\text{*}}=\\:{\\text{arg}\\text{m}\\text{a}\\text{x}}_{{1\\le\\:\\text{j}\\le\\:\\text{n}}_{\\text{A}\\text{n}\\text{g}}}{\\text{P}\\text{G}\\text{A}}_{\\text{j}}$$\u003c/div\u003e\u003cdiv class=\"EquationNumber\"\u003e5\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003ewhere:\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{j}}^{\\text{*}}\\)\u003c/span\u003e \u003c/span\u003e is the index of the angle that produces the \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{P}\\text{G}\\text{A}}_{\\text{R}\\text{o}\\text{t}\\text{D}100}\\:\\)\u003c/span\u003e\u003c/span\u003evalue, and\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{arg}\\text{m}\\text{a}\\text{x}}_{{1\\le\\:\\text{j}\\le\\:\\text{n}}_{\\text{A}\\text{n}\\text{g}}}\\:\\)\u003c/span\u003e \u003c/span\u003eis the operator that returns the index where the maximum is achieved.\u003c/p\u003e \u003cp\u003eUsing the value of the index \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{j}}^{\\text{*}}\\)\u003c/span\u003e\u003c/span\u003e, the optimal angle in degrees is determined using Eq.\u0026nbsp;(\u003cspan refid=\"Equ6\" class=\"InternalRef\"\u003e6\u003c/span\u003e):\u003cdiv id=\"Equ6\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equ6\" name=\"EquationSource\"\u003e\n$$\\:\\:\\:\\:\\:{{{\\theta\\:}}^{\\text{*}}}_{\\text{P}\\text{G}\\text{A}}=\\text{a}\\text{n}\\text{g}\\text{l}\\text{e}\\text{s}\\left({\\text{j}}^{\\text{*}}\\right)$$\u003c/div\u003e\u003cdiv class=\"EquationNumber\"\u003e6\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003ewhere:\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{{{\\theta\\:}}^{\\text{*}}}_{\\text{P}\\text{G}\\text{A}}\\)\u003c/span\u003e \u003c/span\u003e is the optimal angle.\u003c/p\u003e \u003cp\u003eThe reconstruction of the optimal RotD100 accelerogram is carried out by implementing Eq.\u0026nbsp;(\u003cspan refid=\"Equ7\" class=\"InternalRef\"\u003e7\u003c/span\u003e):\u003cdiv id=\"Equ7\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equ7\" name=\"EquationSource\"\u003e\n$$\\:\\:\\:\\:\\:{\\text{a}}_{\\text{R}\\text{o}\\text{t}\\text{D}100}={\\text{a}}_{\\text{N},\\text{i}}\\text{cos}\\left({{\\theta\\:}}^{\\text{*}}\\times\\:\\frac{{\\pi\\:}}{180}\\right)+\\:{\\text{a}}_{\\text{E},\\text{i}}\\text{sin}\\left({{\\theta\\:}}^{\\text{*}}\\times\\:\\frac{{\\pi\\:}}{180}\\right)\\:$$\u003c/div\u003e\u003cdiv class=\"EquationNumber\"\u003e7\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003ewhere:\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{a}}_{\\text{R}\\text{o}\\text{t}\\text{D}100}\\:\\)\u003c/span\u003e \u003c/span\u003eis the optimal rotated acceleration in sample \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:\\text{i}\\)\u003c/span\u003e\u003c/span\u003e\u003c/p\u003e \u003cp\u003eUsing this procedure, the velocity-time and displacement-time histories at the optimal angles \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{{\\theta\\:}}^{\\text{*}}}_{\\text{P}\\text{G}\\text{V}}\\:\\)\u003c/span\u003e\u003c/span\u003eand \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{{\\theta\\:}}^{\\text{*}}}_{\\text{P}\\text{G}\\text{D}}\\:\\)\u003c/span\u003e\u003c/span\u003ecan also be calculated, which produce the values ​​\u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{\\:\\text{P}\\text{G}\\text{V}}_{\\text{R}\\text{o}\\text{t}\\text{D}100}\\:\\)\u003c/span\u003e\u003c/span\u003eand \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{\\text{P}\\text{G}\\text{D}}_{\\text{R}\\text{o}\\text{t}\\text{D}100}\\)\u003c/span\u003e\u003c/span\u003e, respectively.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec7\" class=\"Section2\"\u003e \u003ch2\u003e4.3. Calculation of the maximum response\u003c/h2\u003e \u003cp\u003eUsing MATLAB software, the constantacceleration method (Newmark\u0026rsquo;s method) was implemented to construct pseudoacceleration, pseudovelocity, and displacement spectra for the three orthogonal components (N\u0026ndash;S, E\u0026ndash;W, vertical). For structuralresponse analysis and seismicresistant design, engineers are most interested in the maximum response. Therefore, just as with the seismographic signals, the horizontal response spectra were rotated from 0\u0026deg; to 90\u0026deg;\u0026mdash;generating 91 spectra at each rotation angle\u0026mdash;for structural periods T ranging from 0.0 s to 5.0 s in 0.1 s increments and a 5% critical damping ratio (ζ). The response spectra were derived from the baselinecorrected, bandpassfiltered signals (0.1 Hz to 10 Hz) to subsequently build response spectra over a structural period range of 0.1 s to 10 s (although periods from 5 s to 10 s are generally only considered in specific cases).\u003c/p\u003e \u003cp\u003eThere are two principal definitions for obtaining orientationindependent horizontal response spectra: (1) RotDnn, which computes direct percentiles (minimum, median, maximum) of spectra projected at multiple angles without using an intermediate geometric mean (Boore, \u003cspan citationid=\"CR2\" class=\"CitationRef\"\u003e2010\u003c/span\u003e); and (2) GMRotI nn, which first takes the geometric mean of the two component spectra at each angle, then extracts percentiles (0, 50, 100%) from that series of means. However, using a geometric mean between components can introduce bias depending on the seismograph\u0026rsquo;s initial orientation, and the GMRotI100 value may not strictly equal the maximum RotD100 across all structural periods (G\u0026uuml;l \u0026amp; Taşkın, 2021). For this analysis, the RotDnn method was implemented. This process was executed in MATLAB using a code developed by Dr. Jos\u0026eacute; Manuel Jara Guerrero, professor at the Facultad de Ingenier\u0026iacute;a Civil of the Universidad Michoacana de San Nicol\u0026aacute;s de Hidalgo (personal communication, June 2, 2022).\u003c/p\u003e \u003cp\u003eIt is important to clarify that the angle maximizing the instantaneous peak acceleration (groundlevel RotD100) does not necessarily coincide with the angle that maximizes the spectral pseudoacceleration of an oscillator at a given period (spectrum RotD100), because the former seeks the highest acceleration at any instant, while the latter optimizes the response of a dynamic system that filters and amplifies different frequency components according to its period and damping. Each structural period receives a distinct frequency content in the record, so the direction that produces the largest instantaneous peak rarely matches the direction that yields the greatest resonant response for all periods. Only if the real record behaved like a nearly pure singlefrequency wave\u0026mdash;such that one angle would maximize both instantaneous amplitude and resonant response\u0026mdash;could the two angles coincide, which is extraordinarily rare in practice due to the multiple frequency components present in accelerograms.\u003c/p\u003e \u003cp\u003eSimilarly, the angles that maximize peak velocity and displacement at ground level, as well as those that maximize pseudovelocity and pseudodisplacement for a given oscillator period, do not coincide with each other or with the angle that maximizes acceleration, because each measure is derived by a different operation on the original signal and is influenced by distinct aspects of its frequency and temporal content. Velocity relates to the time integration of acceleration and thus is dominated by lowerfrequency components, while displacement\u0026mdash;being the second integral of the original signal\u0026mdash;is even more so. Consequently, the direction yielding the highest value for each measure depends on the spatial combination of frequencies and phases and can vary significantly between measures.\u003c/p\u003e \u003cp\u003eRegarding oscillator response, each pseudomeasure is computed with different operations on the filtered signal according to its period and damping: pseudoacceleration reflects the force the structure experiences; pseudovelocity relates to kinetic energy; and pseudodisplacement indicates how far the structure moves. Since each measure responds with different sensitivity to particular frequencies and phases, the angles that maximize them also tend to differ\u0026mdash;especially in complex, realworld signals where multiple vibration modes and unsynchronized phases coexist.\u003c/p\u003e \u003cp\u003eIn summary, we have that:\u003cdiv id=\"Equ8\" class=\"Equation\"\u003e\u003cdiv format=\"TEX\" class=\"mathdisplay\" id=\"FileID_Equ8\" name=\"EquationSource\"\u003e\n$$\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:\\:{{\\theta\\:}}_{\\text{P}\\text{G}\\text{A}}^{\\text{*}}\\ne\\:{{\\theta\\:}}_{\\text{P}\\text{G}\\text{V}}^{\\text{*}}\\ne\\:{{\\theta\\:}}_{\\text{P}\\text{G}\\text{D}}^{\\text{*}}\\ne\\:{{\\theta\\:}}_{\\text{S}\\text{A}}^{\\text{*}}\\left(\\text{T}\\right)\\ne\\:{{\\theta\\:}}_{\\text{S}\\text{V}}^{\\text{*}}\\left(\\text{T}\\right)\\ne\\:{{\\theta\\:}}_{\\text{D}}^{\\text{*}}\\left(\\text{T}\\right)\\:$$\u003c/div\u003e\u003cdiv class=\"EquationNumber\"\u003e8\u003c/div\u003e\u003c/div\u003e\u003c/p\u003e \u003cp\u003ewhere:\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{P}\\text{G}\\text{A}}^{\\text{*}}\\)\u003c/span\u003e \u003c/span\u003e, \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{P}\\text{G}\\text{V}}^{\\text{*}}\\)\u003c/span\u003e\u003c/span\u003e and \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{P}\\text{G}\\text{D}}^{\\text{*}}\\)\u003c/span\u003e\u003c/span\u003e are the optimal angles that produce the RotD100 values ​​of the maximum instantaneous accelerations, velocities, and displacements, respectively, at ground level, and,\u003c/p\u003e \u003cp\u003e \u003cspan class=\"InlineEquation\"\u003e \u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{S}\\text{A}}^{\\text{*}}\\left(\\text{T}\\right)\\)\u003c/span\u003e \u003c/span\u003e, \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{S}\\text{V}}^{\\text{*}}\\left(\\text{T}\\right)\\)\u003c/span\u003e\u003c/span\u003e and \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{D}}^{\\text{*}}\\left(\\text{T}\\right)\\)\u003c/span\u003e\u003c/span\u003e, are the optimal angles that produce the RotD100 values ​​of the maximum instantaneous accelerations, velocities, and displacements, respectively, for the structural period that experienced the greatest amplitude for each kinematic magnitude.\u003c/p\u003e \u003cp\u003eBased on the physical and mathematical framework described above, it can likewise be inferred that the RotD0 and RotD50 values for each kinematic measure in the response spectra occur at rotation angles that differ both from each other and from the RotD100 angles at ground level and at the structural period yielding the largest pseudoacceleration, pseudovelocity, and displacement amplitudes. In this analysis, we will not adopt specific notation to denote the optimal angles that produce the RotD0 and RotD50 values; rather, we will simply list the maximum amplitudes of the three kinematic measures for these two rotation components of the accelerographic signals.\u003c/p\u003e \u003c/div\u003e"},{"header":"5. Results","content":"\u003cp\u003eThe data from the Raspberry Shake seismic stations and from the Mexico City Accelerographic Network are presented in Tables\u0026nbsp;\u003cspan refid=\"Tab1\" class=\"InternalRef\"\u003e1\u003c/span\u003e and \u003cspan refid=\"Tab2\" class=\"InternalRef\"\u003e2\u003c/span\u003e. Using the coordinates of each station, the maps in Figs.\u0026nbsp;6 and 7 were created to illustrate the geographic distribution of the seismographic instruments. In the map of Fig.\u0026nbsp;7, the locations of the MCAN stations are shown over the geotechnical zoning of Mexico City, as published by the Secretariat of Comprehensive Risk Management and Civil Protection of the Mexican capital.\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab1\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 1\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eData from the Raspberry seismic stations (Raspberry Shake, S.A., 2025)\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"5\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e \u003cp\u003eStation\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003eType\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003eLatitude\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003eLongitude\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c5\"\u003e \u003cp\u003eLocation\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR6897\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eRS4D\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e18.27027\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-103.34578\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eMaruata, Michoac\u0026aacute;n\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR457D\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eRS4D\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.27928\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-103.72025\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eVilla de \u0026Aacute;lvarez, Colima\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR3949\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eRS3D\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.51351\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-102.41833\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003ePerib\u0026aacute;n de Ramos, Michoac\u0026aacute;n\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR05D8\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eRS4D\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.75676\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-104.35214\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eAutl\u0026aacute;n de Navarro, Jalisco\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR00E0\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eRS3D\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.66667\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-101.23383\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eMorelia, Michoac\u0026aacute;n\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eRC3FD\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eRS4D\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e21.85586\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-102.30009\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eAguascalientes, Aguascalientes\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab2\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 2\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eData from the M CAN stations (Maricarmen S\u0026aacute;nchez Pedroza, personal comunication, January 27, 2025)\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"5\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e \u003cp\u003eStation\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003eName\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003eLatitude\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003eLongitude\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c5\"\u003e \u003cp\u003eLocation\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAE02\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Prim. \"Gonz\u0026aacute;lez Garz\u0026oacute;n\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4290\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0584\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eAeropuerto, Zona Norte\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAL01\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eAlameda\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4356\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1453\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eAlameda Central\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAO24\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eAlberca Ol\u0026iacute;mpica\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3580\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1539\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eR\u0026iacute;o Churubusco y Divisi\u0026oacute;n del Norte\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAP68\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eJard\u0026iacute;n de Ni\u0026ntilde;os \"Juan B.de la Salle\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3809\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1068\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eApatlaco y San Lorenzo\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAR14\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Prim. Jos\u0026eacute; Ordaz\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4808\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0760\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eL\u0026oacute;pez Puebla 2 y Providencia\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAU11\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eAut\u0026oacute;dromo\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3919\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0869\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eAut\u0026oacute;dromo Ricardo Rodr\u0026iacute;guez\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAU46\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Sec. T\u0026eacute;c. No. 14\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3832\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1681\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026Aacute;ngel Urraza y Coyoac\u0026aacute;n\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eBA49\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eBuenos Aires\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4097\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1450\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Sec. No. 102\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eBL45\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eBalderas\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4253\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1481\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Prim. Centro Revoluci\u0026oacute;n\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eBO39\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eBondojito\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4653\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1047\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Prim. Miguel Lanz Duret\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCA59\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eCandelaria\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4258\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1183\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eDeportivo Venustiano Carranza\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCE23\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eCETIS\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4619\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0642\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eCETIS No. 54\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCE32\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eCETIS No. 57\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3858\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0537\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eAv. Tepalcates y Verduzco\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCH84\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Prim. \"L. Portillo\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3300\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1254\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eW. Culhuac\u0026aacute;n\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCI05\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eCibeles\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4186\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1653\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Prim. Alberto Correa\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCJ03\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eCentro Urbano Ju\u0026aacute;rez\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4097\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1567\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eAntonio M. Anza y Orizaba, Col. Roma\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCJ04\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eMultifamiliar Ju\u0026aacute;rez II\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4098\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1566\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eAntonio M. Anza y Orizaba, Col. Roma\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCO47\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eCoyoac\u0026aacute;n\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3714\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1703\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Prim. Centro Escolar Alem\u0026aacute;n\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCO56\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Sec. T\u0026eacute;c. No. 18\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4215\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1590\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eC\u0026oacute;rdoba No. 68, Col. Roma\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCP28\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eCerro del Pe\u0026ntilde;\u0026oacute;n\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4385\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0839\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003ePe\u0026ntilde;\u0026oacute;n de los Ba\u0026ntilde;os\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCS66\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eCDAO\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3728\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0983\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eCentral de Abastos\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCS78\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Sec. T\u0026eacute;c. No. 43\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3656\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.2262\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eColinas del Sur\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCT64\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eCerro del Tepeyac\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4876\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1137\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eM. Salas y Cantera\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCU80\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Prim. \"R. L\u0026oacute;pez Velarde\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.2938\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1037\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003ePerif\u0026eacute;rico Sur, Cuemanco\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDM12\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eDeportivo Moctezuma\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4312\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0963\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eOriente 168 y Norte 25\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDR16\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eDR16 Deportivo Reynosa\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.5005\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1829\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eAzcapotzalco Eje 5 Norte y San Pablo\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDX37\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eXotepingo\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3322\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1439\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eD. G. C. O. H.\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eEO30\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eParque Esparza Oteo\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3885\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1772\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003ePensylvania y Georgia\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eES57\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEscand\u0026oacute;n\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4017\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1775\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Prim. Miguel F. Mart\u0026iacute;nez\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eFJ74\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eFundaci\u0026oacute;n Javier Barros Sierra\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.2990\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.2100\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eCarretera al Ajusco, No. 203\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eGA62\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Sec. T\u0026eacute;c. No. 2\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4385\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1401\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEje Central No. 10. Centro\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eGC38\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eJard\u0026iacute;n de Ni\u0026ntilde;os \"Luz G. Campillo\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3161\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1059\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eJuana Medina y Guarder\u0026iacute;a\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eGR27\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eGranjas\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4747\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1797\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Sec. No. 55\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eHJ72\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eHospital Ju\u0026aacute;rez\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4251\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1301\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eJes\u0026uacute;s Mar\u0026iacute;a, Centro\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eIB22\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Sec. T\u0026eacute;c. No. 95\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3450\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1297\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eCerro Crest\u0026oacute;n y Cerro Mezontepec\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eJA43\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eJamaica\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4053\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1250\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eCentro Cultural Jos\u0026eacute; Ma. Pino Zu\u0026aacute;rez\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eJC54\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eParque Jardines de Coyoac\u0026aacute;n\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3130\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1272\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eDalias e Iris\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eLI33\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eLICONSA\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3064\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-98.9631\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003ePlanta LICONSA Tl\u0026aacute;huac\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eLI58\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Sec. Dna. No. 23\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4263\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1569\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eLiverpool No. 40, Col. Ju\u0026aacute;rez\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eLV17\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eLindavista\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4931\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1275\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eParque Deportivo Av. Lindavista\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eME52\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Sec. T\u0026eacute;c. \"Rafael Dond\u0026eacute;\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4383\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1820\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eMariano Escobedo y Lago Alberto\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMT50\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eMariscal Tito\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4253\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1900\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eReforma y Gandhi\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMY19\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eMeyehualco\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3461\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0433\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eDeportivo Santa Cruz Meyehualco\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNZ20\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eNezahualc\u0026oacute;yotl\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4027\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0000\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eDeportivo Neza - IMSS\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNZ31\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eNezahualc\u0026oacute;yotl\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4167\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0247\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Normal ENEM No. 52\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003ePA34\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Prim. \"\u0026Aacute;lvaro Obreg\u0026oacute;n\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.2016\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0491\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eSan Pedro Atocpan\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003ePD42\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003ePalacio de los Deportes\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4055\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0997\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eR\u0026iacute;o Churubusco y A\u0026ntilde;il\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003ePE10\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Prim. \"Plutarco El\u0026iacute;as Calles\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3800\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1318\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eP. El\u0026iacute;as Calles y Santiago\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eRI76\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eRep\u0026uacute;blica de Italia\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4473\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1000\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eBolivares y Carlos Marx\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eRM48\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEsc. Prim. \"Rodolfo Men\u0026eacute;ndez\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4359\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1280\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eLoreto y San Ildefonso\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSI53\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eSan Sim\u0026oacute;n\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3753\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1483\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Prim. Pedro Ascencio\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSP51\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eSector popular\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3656\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1189\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Prim. Alberto Mazferrer\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSS60\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eSCT-CENDI-SEDESOL\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3930\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1470\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eXola y Universidad\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTH35\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eTl\u0026aacute;huac\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.2786\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.0000\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Prim. Antonio Caso\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTL08\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eDeportivo Antonio Caso T-II\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4500\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1336\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eNonoalco - Tlatelolco\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTL55\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eTlatelolco\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4536\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1425\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eDeportivo 5 de Mayo\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTP13\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eTlalpan\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.2922\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1708\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Prim. 1ro. de Mayo\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eUC44\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eUnidad Colonia IMSS\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4337\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1654\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eVillalongin No. 117\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eUI21\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eU. Iberoamericana\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3700\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.2642\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eUniversidad Iberoamericana\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eVG09\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eValle G\u0026oacute;mez\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4539\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1225\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eEsc. Sec. No. 104\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eVM29\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eVilla del Mar\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.3811\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1253\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eJard\u0026iacute;n de Ni\u0026ntilde;os Valent\u0026iacute;n Z. Orozco\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eXO36\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eJard\u0026iacute;n de Ni\u0026ntilde;os \"Xochimilco\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.2711\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1024\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003eClub Espa\u0026ntilde;a y Chicoco\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eXP06\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003eJard\u0026iacute;n de Ni\u0026ntilde;os \"Xochipilli\"\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e19.4198\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e-99.1353\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e5 de Febrero y Lucas Alam\u0026aacute;n, Centro\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003cdiv id=\"Sec9\" class=\"Section2\"\u003e \u003ch2\u003e5.1. Maximum amplitudes and responses\u003c/h2\u003e \u003cp\u003eTables\u0026nbsp;\u003cspan refid=\"Tab3\" class=\"InternalRef\"\u003e3\u003c/span\u003e and \u003cspan refid=\"Tab4\" class=\"InternalRef\"\u003e4\u003c/span\u003e present the PGA\u003csub\u003eRotD100\u003c/sub\u003e values on the horizontal component \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{P}\\text{G}\\text{A}}^{\\text{*}}\\)\u003c/span\u003e\u003c/span\u003e, as well as the PSA\u003csub\u003eRotD100\u003c/sub\u003e values on the horizontal component \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{S}\\text{A}}^{\\text{*}}\\left(\\text{T}\\right)\\:\\)\u003c/span\u003e\u003c/span\u003eand the structural period that experienced the greatest dynamic amplification, for each Raspberry Shake seismic station and for the Mexico City Accelerographic Network.\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab3\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 3\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eMaximum RotD100 accelerations and pseudo-accelerations on the Raspberry Shake stations\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"5\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e \u003cp\u003eStation\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEpicentral Distance (km)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003ePGA (cm/s\u003csup\u003e2\u003c/sup\u003e)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003ePSA (cm/s\u003csup\u003e2\u003c/sup\u003e)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c5\"\u003e \u003cp\u003eT (s)\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR6897\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e29.86\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e72.13\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e259.40\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.4\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR457D\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e90.15\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e22.52\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e70.21\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.8\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR3949\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e160.34\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e20.05\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e89.72\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.2\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR05D8\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e166.39\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e6.65\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e29.73\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.8\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eR00E0\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e271.30\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.02\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e5.14\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.4\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eRC3FD\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e393.99\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e0.90\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e3.07\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.0\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab4\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 4\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eMaximum RotD100 accelerations and pseudo-accelerations at the MCAN stations\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"5\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"char\" char=\".\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e \u003cp\u003eEstaci\u0026oacute;n\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003eEpicentral Distance (km)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003ePGA (cm/s\u003csup\u003e2\u003c/sup\u003e)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003ePSA (cm/s\u003csup\u003e2\u003c/sup\u003e)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c5\"\u003e \u003cp\u003eT (s)\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAE02\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e478.34\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.14\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e14.02\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.2\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAL01\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e469.58\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.39\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e14.21\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.7\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAO24\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e466.96\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e2.23\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e10.42\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.0\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAP68\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e472.30\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.62\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e18.23\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.3\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAR14\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e477.75\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.64\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e26.10\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.8\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAU11\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e474.59\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.27\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e29.08\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e3.6\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAU46\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e 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\u003cp\u003eBL45\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e469.05\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e5.28\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e18.40\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.0\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eBO39\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e474.44\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.16\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e20.06\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.0\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCA59\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e472.12\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.40\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e20.19\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.1\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCE23\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e478.51\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.60\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e14.87\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.8\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCE32\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e477.87\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e2.59\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e14.58\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e3.7\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCH84\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e469.30\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e2.51\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e15.52\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.1\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCI05\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e467.13\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.85\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e1.90\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.7\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCJ03\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e467.81\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.76\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e16.38\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.9\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCJ04\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e467.83\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.77\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e16.68\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.7\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCO47\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e465.56\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.26\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e3.90\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.0\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCO56\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e467.85\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.17\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e24.34\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.9\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCP28\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e475.94\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.04\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e3.76\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.0\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCS66\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e473.00\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e5.11\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e35.11\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e5.0\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCS78\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e459.68\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e0.90\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e2.65\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.0\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCT64\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e474.06\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e0.41\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e1.33\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.1\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCU80\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e470.82\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e5.68\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e28.22\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.1\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDM12\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e474.50\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.67\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e33.24\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.8\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDR16\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e467.31\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.90\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e9.12\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.6\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDX37\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e467.44\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.08\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e14.21\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.9\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eEO30\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e465.23\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.35\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e4.10\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.6\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eES57\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e465.50\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.35\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e10.29\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.8\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eFJ74\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e459.94\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.10\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e4.08\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.00\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e 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align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e25.74\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.40\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eJC54\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e468.77\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.00\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e25.61\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.00\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eLI33\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e485.59\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.49\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e23.19\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.20\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eLI58\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e468.17\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.73\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e18.59\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.90\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eLV17\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e472.79\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.14\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e14.77\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.00\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eME52\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e465.88\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e2.28\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e10.30\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.70\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMT50\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e464.76\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.64\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e5.64\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.70\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMY19\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e478.10\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.61\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e17.44\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.10\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNZ20\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e483.76\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e4.22\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e15.58\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.80\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNZ31\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e481.53\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.51\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e 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\u003cp\u003eSI53\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e467.91\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e2.69\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e16.85\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.10\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSP51\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e470.72\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e5.35\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e25.77\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.80\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSS60\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e468.43\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.81\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e16.78\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e3.10\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTH35\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e481.25\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e5.38\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e20.81\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e3.40\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTL08\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e471.12\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.18\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e17.43\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.70\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTL55\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e470.29\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e2.72\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e11.80\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.50\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTP13\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e463.85\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.15\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e5.01\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.00\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eUC44\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e467.48\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e2.92\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e10.97\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e1.20\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eUI21\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e455.88\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e1.34\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e4.86\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e0.70\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eVG09\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e472.35\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e3.80\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e18.28\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.00\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eVM29\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e470.40\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e5.34\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e30.34\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.20\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eXO36\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e470.51\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e5.88\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e29.46\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e3.20\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eXP06\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c2\"\u003e \u003cp\u003e470.24\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c3\"\u003e \u003cp\u003e5.13\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c4\"\u003e \u003cp\u003e22.16\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"char\" char=\".\" colname=\"c5\"\u003e \u003cp\u003e2.00\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003cp\u003eIn Section 2 of the Supplementary Material, for the Raspberry Shake and MCAN seismic stations, Tables T1 through T6 present the maximum accelerations, velocities, and displacements recorded on the three orthogonal components; Tables T7 and T8 show the RotD100 values for the maximum accelerations, velocities, and displacements at the optimal rotation angles for each kinematic measure; Tables T9 through T14 list the peak pseudoaccelerations, pseudovelocities, and pseudodisplacements on the three orthogonal components for the structural periods that experienced the greatest dynamic amplification; and Tables T15 through T20 provide the pseudoaccelerations, pseudovelocities, and pseudodisplacements for the structural periods with the highest dynamic amplification at the rotation angles that yield the RotD100, RotD50, and RotD0 values for each kinematic measure.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec10\" class=\"Section2\"\u003e \u003ch2\u003e5.2. Seismograms and response spectra\u003c/h2\u003e \u003cp\u003eThe seismogram and response‑spectrum calculations were performed for the six Raspberry Shake seismic stations and for each of the 63 accelerographs of the Mexico City Accelerographic Network (MCAN) that recorded the earthquake in Mexico City. Consequently, a supplementary document was produced in which all seismograms and response spectra were published. For the RotD100 component of the horizontal accelerographic records, velocity and displacement time histories were also computed.\u003c/p\u003e \u003cdiv id=\"Sec11\" class=\"Section3\"\u003e \u003ch2\u003e5.2.1. Raspberry Shake Seismic Stations\u003c/h2\u003e \u003cp\u003eFigure 8 shows the acceleration time history on component \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{P}\\text{G}\\text{A}}^{\\text{*}}\\)\u003c/span\u003e\u003c/span\u003e, where the RotD100 value of the horizontal accelerations was produced at station R6897, located in Maruata, Michoac\u0026aacute;n. In Figure F1 of Section 3 of the Supplementary Material, the acceleration time history is shown along with the corresponding velocity and displacement time histories, each at their respective optimal rotation angles where the RotD100 values of each kinematic measure are generated.\u003c/p\u003e \u003cp\u003eFigure 9 shows the pseudo-acceleration spectra for the three orthogonal components, and Fig.\u0026nbsp;10 presents the rotated spectra of pseudo-acceleration, pseudo-velocity, and displacement corresponding to the components where the RotD0, RotD50, and RotD100 values of each horizontal kinematic measure were produced, as well as the 91 response spectra across rotation angles from 0\u0026deg; to 90\u0026deg;, at station R6897, located in Maruata, Michoac\u0026aacute;n.\u003c/p\u003e \u003cp\u003eFigure 11 shows the 91 pseudoacceleration spectra at the rotation angle 0\u0026deg;-90\u0026deg; for stations R457D, R3949, R05D8, R00E0 and RC3FD.\u003c/p\u003e \u003cp\u003eThe response spectra for the three orthogonal components are shown in Figures F8 to F13 of section 4.1.1 of the supplementary material, and the RotD0, 50 and 100 response spectra, and the 91 response spectra at the 0\u0026deg;-90\u0026deg; rotation angle for the Raspberry Shake stations are shown in Figures F77 to F82 of section 4.2.1 of the same document.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec12\" class=\"Section3\"\u003e \u003ch2\u003e5.2.2. MCAN seismic stations\u003c/h2\u003e \u003cp\u003eFigure 12 shows the acceleration time histories on component \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{P}\\text{G}\\text{A}}^{\\text{*}}\\)\u003c/span\u003e\u003c/span\u003e, where the RotD100 values were produced at the MCAN seismic stations that recorded the highest amplitudes in each geotechnical zone of Mexico City. Figures F2 through F7 in Section 3 of the Supplementary Material present the acceleration time histories along with the corresponding velocity and displacement time histories for these six accelerographic stations.\u003c/p\u003e \u003cp\u003eFigure 13 shows the horizontal RotD100 pseudo-acceleration spectra on component \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{S}\\text{A}}^{\\text{*}}\\left(\\text{T}\\right)\\)\u003c/span\u003e\u003c/span\u003e of each MCAN seismic station, grouped by geotechnical zone of Mexico City.\u003c/p\u003e \u003cp\u003eFigure 14a shows the 91 pseudoacceleration spectra from MCAN station BA49, an accelerograph in which the highest pseudoacceleration occurred in its maximum RotD100 envelope, with a value of 46.14 cm/s\u003csup\u003e2\u003c/sup\u003e for the structural period of 2.1 seconds. Figure\u0026nbsp;14b shows the 91 pseudoacceleration spectra from MCAN station CS66, an accelerograph in which the maximum pseudoacceleration in the RotD100 envelope occurred for the structural period of 5.0 seconds with a value of 34.42 cm/s\u003csup\u003e2\u003c/sup\u003e.\u003c/p\u003e \u003cp\u003eFigures F14 to F76 in section 4.1.2 of the supplementary material show the response spectra for the three orthogonal components, and Figures F83 to F145 in section 4.2.2 of the same document show the RotD0, 50 and 100 response spectra, and the 91 response spectra at the 0\u0026deg;-90\u0026deg; rotation angle for the stations of the Mexico City Accelerographic Network.\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e"},{"header":"6. Maps of seismic accelerations in Mexico City","content":"\u003cp\u003eIn order to understand the distribution of ground level accelerations and pseudo seismic accelerations in Mexico City, maps were generated showing, every 0.5 seconds of structural period in the urban area of ​​Mexico City, the dispersion of accelerations and pseudo accelerations, by performing an interpolation using the Kriging method using the ArcGIS version 10.8.2 program. Figure\u0026nbsp;15 shows the map of the maximum seismic accelerations at ground level at the optimal angle that produces the RotD100 value, and Fig.\u0026nbsp;16 shows an isoacceleration map generated from the information in the previous map, whose equal acceleration curves were placed on the geotechnical zoning layer of Mexico City.\u003c/p\u003e \u003cp\u003eFigure 17 shows the pseudoacceleration distribution map corresponding to the structural period T\u0026thinsp;=\u0026thinsp;2.1 seconds, and Fig.\u0026nbsp;18 shows the pseudoacceleration contour map for the same structural period. The seismic pseudoacceleration maps are shown in Figures F146 to F156 of section 5.1 of the supplementary material, and the contours corresponding to the pseudoacceleration maps are shown in Figs.\u0026nbsp;157 to 156 in section 5.2 of the same document, juxtaposed over the geotechnical zoning of Mexico City. The maximum interpolated pseudoacceleration values ​​are associated with the envelope of the RotD100 pseudoacceleration spectrum of each MCAN accelerograph in the \u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\:{{\\theta\\:}}_{\\text{S}\\text{A}}^{\\text{*}}\\left(\\text{T}\\right)\\:\\)\u003c/span\u003e\u003c/span\u003e component.\u003c/p\u003e"},{"header":"7. Description of structural and non-structural damage in homes","content":"\u003cp\u003eThe magnitude 6.1 earthquake recorded in Coalcom\u0026aacute;n, Michoac\u0026aacute;n, caused light structural and non-structural damage to various civil works in southeastern Michoac\u0026aacute;n and in Colima. Minor damage was reported in homes and public buildings in the municipalities of Coalcom\u0026aacute;n and Chinicuila, Michoac\u0026aacute;n, including cracks in slabs, detachment of tiles and plaster, as well as fissures in adobe walls. Damage was also reported in the municipal hall and the main church of Chinicuila, with minor cracking and detachment. Minor landslides occurred on the Colima\u0026ndash;Manzanillo highway and on Federal Coastal Highway 200, affecting slopes and hillsides, which required cleanup and material removal by the authorities. Despite multiple aftershocks following the earthquake, no casualties or major damage to other critical infrastructure\u0026mdash;such as schools or archaeological sites\u0026mdash;were reported (Arrieta, \u003cspan citationid=\"CR1\" class=\"CitationRef\"\u003e2025\u003c/span\u003e; Delgadillo \u0026amp; Guzm\u0026aacute;n, \u003cspan citationid=\"CR5\" class=\"CitationRef\"\u003e2025\u003c/span\u003e; Regi\u0026oacute;n LC, \u003cspan citationid=\"CR13\" class=\"CitationRef\"\u003e2025\u003c/span\u003e; Quadrat\u0026iacute;n Michoac\u0026aacute;n, 2025). This section provides a brief description of structural and non-structural damage elements observed in dwellings and discusses possible damage mechanisms triggered by the seismic motion, based on photographs sent to the author of this article by residents in the municipalities of Michoac\u0026aacute;n and Colima near the epicentral region. The photographs are shown in Figs.\u0026nbsp;19 through 23.\u003c/p\u003e \u003cp\u003eFigure 19 shows masonry walls composed of cement partition walls covered with plaster or render (surface finish) or with earth blocks (adobe) or a mixture of compacted earth with straw and other additives, covered with plaster or render; they function as load-bearing or enclosing walls, depending on the structural configuration of the house. The interior render or render consists of a mortar mixture (lime, cement, or gypsum) applied to the surface of the adobe to smooth and protect the wall, and is subsequently painted; it is partially detached, exposing the adobe structure, with cracks and areas of total or partial detachment. The sheet metal roof with a steel structure consists of a roof with corrugated metal sheets (possibly galvanized steel) supported by metal elements (beams or corrugated iron beams) painted green, suggesting that it is an added or adapted structure. It provides protection against the elements, and the way in which its covering is connected to the walls (anchors) influences the seismic behavior of the building. Partial detachment of the finish manifests itself in a considerably large area where the plaster and paint on both walls have come off, leaving the wall exposed. This is due to the pounding and vibration during the earthquake, which exceeds the plaster's adhesion capacity, and the lack of mechanical bonds (mesh or similar) between the adobe and the plaster, since the plaster, being more rigid, does not accompany the deformation of the adobe during the earthquake and cracks or comes off.\u003c/p\u003e \u003cp\u003eFigure 20 shows a masonry wall, on the interior panel, covered with a render and paint, possibly over masonry (brick, block, or adobe), whose texture and thickness suggest a cement or lime render with paint applied to the surface. If it is load-bearing masonry, it forms part of the building's vertical load-bearing and lateral resistance system, and if it is an enclosing wall, its primary function is dividing, although it may contribute to overall stability. In the upper left part of the image, an opening (window or vent) with a light-filtering curtain can be seen. This represents a critical point by reducing the wall's load-bearing section and concentrating stresses at the corners. The render or plaster shows fissures, flaking, or fine cracks that could cause partial detachment over time due to seismic vibrations that exceed the deformation capacity of the finish and changes in humidity or temperature combined with deficient adhesion of the render. In addition, hairline or shrinkage cracks and thin, superficial cracks are observed in the paint and the finishing layer, especially if the plaster mix was not properly proportioned. These cracks are due to the shrinkage of the mortar upon drying and the lack of control joints or embedded reinforcement mesh. Seismic shaking accentuates these cracks, making them more visible.\u003c/p\u003e \u003cp\u003eFigure 20 shows a masonry wall, on the interior wall, covered with plaster and paint, possibly over masonry (brick, block, or adobe), whose texture and thickness suggest a cement or lime plaster with paint applied to the surface. If it is load-bearing masonry, it forms part of the building's vertical load-bearing and lateral resistance system. If it is an enclosing wall, its primary function is to divide, although it may contribute to overall stability. In the upper left corner of the image, an opening (window or vent) with a light-filtering curtain can be seen. This represents a critical point, reducing the wall's load-bearing cross-section and concentrating stresses at the corners. The plaster or render exhibits fissures, flaking, or fine cracks that could cause partial detachment over time due to seismic vibrations that exceed the finish's deformation capacity and changes in humidity or temperature combined with poor plaster adhesion. In addition, capillary or shrinkage cracks, thin and superficial cracks, are observed in the paint and finish coat, especially if the plaster mix was not properly proportioned. These cracks are due to the shrinkage of the mortar upon drying and the lack of control joints or embedded reinforcing mesh. The seismic movement accentuates these cracks, making them more visible.\u003c/p\u003e \u003cp\u003eFigure 22 shows a wall along its exterior, most likely made of masonry (partition or block) or reinforced concrete with a cement mortar plaster and paint on the surface. It shows a uniform finish. At the top, what appears to be a reinforced concrete slab can be seen, perhaps a cantilever or part of the floor or roof slab projecting outwards. At the bottom right, a glass enclosure can be seen, possibly a window or sliding French window with an aluminum or PVC frame. In load-bearing masonry walls, openings represent discontinuities that concentrate stresses at the corners. The image shows diagonal and horizontal cracks, including a main oblique crack with branches, indicative of shear stress due to horizontal forces during an earthquake, especially in walls without adequate reinforcement, and of bending at the top of the wall when the slab or cantilever exerts lateral thrust or is poorly anchored. Likewise, discontinuities in windows or doors generate stress concentrations that propagate cracks.\u003c/p\u003e \u003cp\u003eFigure 23 shows an exterior wall along its outer surface, probably made of masonry (brick, concrete block, or even adobe, depending on the area) covered with a plaster or mortar render and painted green. It probably functions as a perimeter wall or fa\u0026ccedil;ade, providing enclosure and support if it is load-bearing. The plaster and paint finish, consisting of a layer of mortar or plaster, protects the masonry from the elements and improves its aesthetics, although it does not provide significant structural strength. An irregular horizontal crack can be seen crossing the surface of the plaster halfway up the wall. This could be due to non-structural damage limited to the finish or to structural damage if the crack is deep and crosses the masonry or the joints between construction elements. Around the crack, there are areas of less adherent plaster, which are susceptible to detachment as a result of seismic vibrations or thermal expansion and contraction, which produce microcracks in the finishing layer and encourage its separation from the substrate.\u003c/p\u003e"},{"header":"8. Conclusions","content":"\u003cp\u003eThe rotated accelerographic records (RotD100) reveal a highly significant variability in peak ground accelerations between stations, even within the same urban area of Mexico City. These variabilities is attributable to the interaction between the direction of incidence of elastic waves, local geology, and the rupture geometry of the fault. Within the Mexico City Accelerographic Network (MCAN), station BA49 (geotechnical zone IIIc) recorded the highest RotD100 pseudoacceleration (46.14 cm/s\u0026sup2;) for a structural period of 2.1 s, with peak ground accelerations reaching 7.17 cm/s\u0026sup2;. In contrast, softer zones (IIId) exhibited comparatively lower amplification during this particular event. The rotated response spectra (RotDnn) demonstrate that the peaks of pseudoacceleration, pseudovelocity, or pseudodisplacement occur at different angles for each station and structural period, confirming that the direction maximizing the instantaneous acceleration does not necessarily coincide with the one that maximizes the spectral response across all periods, since each period filters specific frequency components.\u003c/p\u003e \u003cp\u003eKriging interpolation of ground-level RotD100 accelerations and pseudoaccelerations reveals a spatial distribution dependent on the structural period, with higher concentrations in parts of zone IIIc of Mexico City for T\u0026thinsp;=\u0026thinsp;2.1 s. This challenges the assumption that geotechnical zoning always results in monotonic amplification, and highlights that intermediate zones may amplify more than the softest ones under specific frequency contents and wave incidence directions defined by rupture geometry. Although zone IIId is typically associated with greater amplification, in this moderate-magnitude, long-distance earthquake (~\u0026thinsp;470 km), the dominant energy in relatively low frequencies (~\u0026thinsp;2\u0026ndash;5 s) resonated more effectively in zone IIIc. This was further enhanced by the incoming wave direction (strike\u0026thinsp;~\u0026thinsp;80.7\u0026deg;, dip\u0026thinsp;~\u0026thinsp;67.8\u0026deg;, rake ~\u0026ndash;110.9\u0026deg;) and multiple refractions through the basin stratigraphy, while the softer soil of zone IIId shifted energy toward longer periods outside the dominant frequency band of the event.\u003c/p\u003e \u003cp\u003eConsistently, RotD100 values exceeded the peaks of the orthogonal components (N\u0026ndash;S, E\u0026ndash;W), validating the RotDnn approach over methodologies such as GMRotI, which may underestimate demands. This spatial and angular variability underscores the essential role of signal rotation in accurately characterizing maximum seismic hazard, informing orientation-independent seismic design spectra, generating dynamic zonation maps by period, and, investigating the relationship between fault mechanism and local response. Consequently, it is recommended to systematically incorporate RotDnn rotations in accelerogram processing and spectrum construction, to develop maps for multiple structural periods, integrate rupture and basin propagation models, and update design codes with rotational parameters to capture realistic directional demands\u0026mdash;maintaining rotated accelerogram collections for updating dynamic hazard maps, given that each event may display non-intuitive behavior relative to static zonations.\u003c/p\u003e"},{"header":"References","content":"\u003col\u003e\u003cli\u003e\u003cspan\u003eArrieta C (2025) Sismo provoca da\u0026ntilde;os a 25 viviendas en dos municipios de Michoac\u0026aacute;n [Earthquake causes damage to 25 homes in two municipalities of Michoac\u0026aacute;n]. El Universal. 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International Federation of Digital Seismograph Networks. \u003cspan class=\"ExternalRef\"\u003e\u003cspan class=\"RefSource\"\u003ehttps://doi.org/10.7914/SN/AM\u003c/span\u003e\u003cspan address=\"10.7914/SN/AM\" targettype=\"DOI\" class=\"RefTarget\"\u003e\u003c/span\u003e\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eRegi\u0026oacute;n LC (2025) Afectaciones por sismo en Coalcom\u0026aacute;n y Apatzing\u0026aacute;n [Earthquake impacts in Coalcom\u0026aacute;n and Apatzing\u0026aacute;n]. 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Retrieved January 26, 2025, from \u003cspan class=\"ExternalRef\"\u003e\u003cspan class=\"RefSource\"\u003ehttp://www.ssn.unam.mx/sismicidad/reportes-especiales/2025/SSNMX_rep_esp_20250112_Michoacan_M61.pdf\u003c/span\u003e\u003cspan address=\"http://www.ssn.unam.mx/sismicidad/reportes-especiales/2025/SSNMX_rep_esp_20250112_Michoacan_M61.pdf\" targettype=\"URL\" class=\"RefTarget\"\u003e\u003c/span\u003e\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eSismol\u0026oacute;gico Nacional [@SismologicoMX] (2025) January 12). SISMO Magnitud 6.1 Loc 47 km al SUROESTE de COALCOM\u0026Aacute;N, MICH 12/01/25 02:32:53 Lat 18.49 Lon \u0026ndash;\u0026thinsp;103.49 Pf 30 km [Tweet]. X. \u003cspan class=\"ExternalRef\"\u003e\u003cspan class=\"RefSource\"\u003ehttps://x.com/SismologicoMX/status/1878363563955483048\u003c/span\u003e\u003cspan address=\"https://x.com/SismologicoMX/status/1878363563955483048\" targettype=\"URL\" class=\"RefTarget\"\u003e\u003c/span\u003e\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eTrifunac MD (1971) Zero baseline correction of strong-motion accelerograms. Bull Seismol Soc Am 61(5):1201\u0026ndash;1211. \u003cspan class=\"ExternalRef\"\u003e\u003cspan class=\"RefSource\"\u003ehttps://doi.org/10.1785/BSSA0610051201\u003c/span\u003e\u003cspan address=\"10.1785/BSSA0610051201\" targettype=\"DOI\" class=\"RefTarget\"\u003e\u003c/span\u003e\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eU.S. Geological Survey (2025) M 6.2\u0026ndash;18 km SE of Aquila, Mexico. Earthquake Hazards Program. Retrieved January 26, 2025, from \u003cspan class=\"ExternalRef\"\u003e\u003cspan class=\"RefSource\"\u003ehttps://earthquake.usgs.gov/earthquakes/eventpage/us6000pjig/executive\u003c/span\u003e\u003cspan address=\"https://earthquake.usgs.gov/earthquakes/eventpage/us6000pjig/executive\" targettype=\"URL\" class=\"RefTarget\"\u003e\u003c/span\u003e\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eUniversidad Nacional Aut\u0026oacute;noma de M\u0026eacute;xico, Instituto de Geof\u0026iacute;sica (2025) Reporte preliminar UIS-II UNAM: Sismo de magnitud 6.1 \u0026ndash; Michoac\u0026aacute;n, M\u0026eacute;xico [Preliminary report UIS-II UNAM: Magnitude 6.1 earthquake \u0026ndash; Michoac\u0026aacute;n, Mexico] [PDF]. Retrieved January 26, 2025, from \u003cspan class=\"ExternalRef\"\u003e\u003cspan class=\"RefSource\"\u003ehttps://www.uis.unam.mx/PDF/UIS-IIUNAM_rep_prelim_20250112_023250_MICH_M6_1.pdf\u003c/span\u003e\u003cspan address=\"https://www.uis.unam.mx/PDF/UIS-IIUNAM_rep_prelim_20250112_023250_MICH_M6_1.pdf\" targettype=\"URL\" class=\"RefTarget\"\u003e\u003c/span\u003e\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e\u003c/ol\u003e"}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":true,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":false,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":true,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"earthquake, response spectrum, acceleration, rotation, structural period, dynamic amplification, damage","lastPublishedDoi":"10.21203/rs.3.rs-6926239/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6926239/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eOn January 12, 2025, at 02:32:53 (UTC\u0026ndash;06), a magnitude 6.1 M\u003csub\u003eW\u003c/sub\u003e earthquake occurred with its epicenter at 18.496\u0026deg; N, 103.499\u0026deg; W (47 km SW of Coalcom\u0026aacute;n de V\u0026aacute;zquez Pallares, Michoac\u0026aacute;n) and a hypocenter at a depth of 30 km. For structural response analysis, pseudo‑acceleration, pseudo‑velocity, and displacement spectra were generated for structural periods T from 0.0 to 5.0 s in 0.1 s increments, using a 5% critical damping ratio (ζ), based on accelerographic signals corrected and band‑pass filtered between 0.1 Hz and 10 Hz. Seismographs record ground motion along three orthogonal components: two horizontal (N\u0026ndash;S and E\u0026ndash;W) and one vertical. Although these axes facilitate global referencing, the maximum acceleration may occur at an intermediate direction θ, so that its projections onto the N\u0026ndash;S and E\u0026ndash;W axes (a cos θ and a sin θ) lie below the absolute value a. To capture the true horizontal peak, the two horizontal components are rotated and the RotD100 value is computed (the 100th percentile of the rotated amplitudes), since neither isolated component guarantees the absolute maximum. The greatest rotated acceleration in this seismic event was recorded at 29.86 km from the epicenter, with a value of 72.13 cm/s\u0026sup2;, and the maximum rotated pseudo‑acceleration reached 259.40 cm/s\u0026sup2; at a structural period of 0.40 s. In Mexico City proper\u0026mdash;within the area covered by the Accelerographic Network of the City of Mexico operated by the Centro de Instrumentaci\u0026oacute;n y Registro S\u0026iacute;smico A.C.\u0026mdash;the peak rotated acceleration reached 7.17 cm/s\u0026sup2;, and the peak rotated pseudo‑acceleration was 46.14 cm/s\u0026sup2; at a structural period of 2.1 s; both the PGA and PSA peaks occurred in the Cuauht\u0026eacute;moc borough, over geotechnical zone IIIc.\u003c/p\u003e","manuscriptTitle":"The 6.1 magnitude earthquake in Aquila, Michoacán on January 12, 2025","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-06-20 04:14:45","doi":"10.21203/rs.3.rs-6926239/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"a4eaf7c8-0598-4daa-9969-428524b48fd8","owner":[],"postedDate":"June 20th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":50267312,"name":"Civil Engineering"},{"id":50267313,"name":"Seismology"}],"tags":[],"updatedAt":"2025-06-20T04:14:45+00:00","versionOfRecord":[],"versionCreatedAt":"2025-06-20 04:14:45","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6926239","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6926239","identity":"rs-6926239","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}