Assessment of local Seismic records and Spatiotemporal distribution Study in the Comoros Archipelago between 2017 and 2021

Assessment of local Seismic records and Spatiotemporal distribution Study in the Comoros Archipelago between 2017 and 2021 | 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 Assessment of local Seismic records and Spatiotemporal distribution Study in the Comoros Archipelago between 2017 and 2021 Mariama Madi This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8756738/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 8 You are reading this latest preprint version Abstract Seismic data for the period 2017-2021 (during which a significant earthquake swarm occurred east of Mayotte Island in 2018) were obtained from the Comoros Karthala Volcano Observatory (KVO), and usable sections were selected. This study uses duration magnitude data selected from the KVO data, a complete assembled catalog of 234 seismic events ranging from (Md) ~ 0.64 to 4.95 for Spatiotemporal analysis over the 5 years. Mapping of yearly spatial distribution and a temporal analysis for 2018 yielded the calculated seismic productivity a-value and the relative distribution of the earthquake b-value “a = 5.768±0.16 ≈ 5.77±0.16”, “b = 0.994±0.13 ≈ 0.1±0.13”. A comprehensive stress regime was created with a generated 3D seismic surface visualization showing that the accumulated seismic stress field derived from the 234 earthquakes and stress calculation “σ_ i (x,y) = 9 815 400” on the highest Md4.95 concentrated in the East of Mayotte Island in 2018. No significant NW-SE mainshock-aftershock extension of the five-year spatial distribution patterns was observed. Furthermore, the range of a-value and b-value supports a regional stress type resulting from seismo-volcanic unrest. The 2017-2021 spatial distribution and the 2018 temporal analysis, along with the cumulative earthquake stress field regime, provide an alternative approach to deciphering volcano-induced seismicity in the Comoros and afford useful insights for the monitoring of volcanic eruptions in the local and regional contexts. Comoros seismic records 2017-2025 Mayotte earthquake swarm 2018 Spatiotemporal distribution Stress field regime volcano monitoring Full Text Additional Declarations No competing interests reported. Supplementary Files SupplementaryTables.xlsx Cite Share Download PDF Status: Under Review Version 1 posted Reviews received at journal 18 May, 2026 Reviews received at journal 24 Feb, 2026 Reviewers agreed at journal 23 Feb, 2026 Reviewers agreed at journal 13 Feb, 2026 Reviewers invited by journal 13 Feb, 2026 Editor assigned by journal 12 Feb, 2026 Submission checks completed at journal 06 Feb, 2026 First submitted to journal 01 Feb, 2026 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. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8756738","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":591994731,"identity":"a51c5172-d29b-4001-9fec-5a74538f04ff","order_by":0,"name":"Mariama Madi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA2klEQVRIiWNgGAWjYDADxobDB4CUhAzxWpgbjyWAtPAQr4W9+YwBiCasRbf9dOKnmzvsonnbznx+daPGgoeB/fDRDfi0mJ3J3SydeyY5d2bP2W3WOceADuNJS7uBV8uB3A3SuW3MuRtnnN1mnMMG1CLBY4Zfy/m3m3/nttXn7r//5plxzj9itNzI3Qa05XBuY8MZ5se5bURpebvNOrftOFDLMTPm3D4JHjaCfjmfu/l2bls1UMvhx59zvtXJ8bMfPoZXCzJgkwCTxCoHAeYPpKgeBaNgFIyCkQMA+4pRZTzbNF8AAAAASUVORK5CYII=","orcid":"","institution":"NDC for CTBTO Relevant functions, Centre National de Documentation et de Recherche Scientifique (CNDRS)","correspondingAuthor":true,"prefix":"","firstName":"Mariama","middleName":"","lastName":"Madi","suffix":""}],"badges":[],"createdAt":"2026-02-01 14:09:19","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8756738/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8756738/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":102967210,"identity":"7d4bd2e4-5764-4613-b12e-f610a9998e6f","added_by":"auto","created_at":"2026-02-19 04:40:47","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1736491,"visible":true,"origin":"","legend":"","description":"","filename":"MadiPAGEOPHFeb1stmanuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8756738/v1_covered_07613006-5a15-418c-b95d-759105b2ca95.pdf"},{"id":102966911,"identity":"0d60c515-bdbd-4eea-b7d0-fdbb23f1aae5","added_by":"auto","created_at":"2026-02-19 04:39:11","extension":"xlsx","order_by":0,"title":"","display":"","copyAsset":false,"role":"supplement","size":47082,"visible":true,"origin":"","legend":"","description":"","filename":"SupplementaryTables.xlsx","url":"https://assets-eu.researchsquare.com/files/rs-8756738/v1/b65d107f757bbfd6cf57683b.xlsx"}],"financialInterests":"No competing interests reported.","formattedTitle":"\u003cp\u003eAssessment of local Seismic records and Spatiotemporal distribution Study in the Comoros Archipelago between 2017 and 2021\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"pure-and-applied-geophysics","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"paag","sideBox":"Learn more about [Pure and Applied Geophysics](https://www.springer.com/journal/24)","snPcode":"24","submissionUrl":"https://submission.nature.com/new-submission/24/3","title":"Pure and Applied Geophysics","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Comoros, seismic records 2017-2025, Mayotte earthquake swarm 2018, Spatiotemporal distribution, Stress field regime, volcano monitoring","lastPublishedDoi":"10.21203/rs.3.rs-8756738/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8756738/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Seismic data for the period 2017-2021 (during which a significant earthquake swarm occurred east of Mayotte Island in 2018) were obtained from the Comoros Karthala Volcano Observatory (KVO), and usable sections were selected. 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