Fault Model of the 2024 Noto Peninsula Earthquake Based on Aftershock, Tsunami, and GNSS Data

Fault Model of the 2024 Noto Peninsula Earthquake Based on Aftershock, Tsunami, and GNSS Data | 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 Fault Model of the 2024 Noto Peninsula Earthquake Based on Aftershock, Tsunami, and GNSS Data Ayumu Mizutani, Bruno Adriano, Erick Mas, Shunichi Koshimura This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4167995/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 1, 2024, at 16:10 (local time), a magnitude (Mw) 7.5 earthquake occurred on the Noto Peninsula, Japan. Japan Meteorological Agency seismic intensity scale of 7 was observed and a tsunami warning was issued for a wide area along the Japan Sea. In this study, we constructed the finite fault model of this earthquake. First, we estimated the fault geometry based on the aftershock within 7 days after the mainshock, and then, estimated the slip distribution using the tsunami and GNSS data. Most of the obtained fault geometry agreed with the one detected by the Japan Sea earthquake and tsunami project (JSPJ) in the strike angle but not in the dip angle; the angles were more gradual. The slip distribution had two large slip areas on the east and west sides of the hypocenter. The model also indicated that the eastern part of the fault, or the fault buried under the sea floor, generated the tsunami which was dominant east of the peninsula. In the west of the peninsula, on the other hand, the tsunami generated by the westernmost fault, or the inland fault under the peninsula, hit first, and then the tsunami propagating from the east of the peninsula arrived. The 2024 Noto earthquake Finite fault model Fault geometry Fault slip distribution Tsunami GNSS Full Text Supplementary Files GA.png Supplementarymaterial.pdf 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. 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-4167995","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":287163668,"identity":"a247cd7e-6387-4ea5-8eac-17b501290cc5","order_by":0,"name":"Ayumu 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Japan Meteorological Agency seismic intensity scale of 7 was observed and a tsunami warning was issued for a wide area along the Japan Sea. In this study, we constructed the finite fault model of this earthquake. First, we estimated the fault geometry based on the aftershock within 7 days after the mainshock, and then, estimated the slip distribution using the tsunami and GNSS data. Most of the obtained fault geometry agreed with the one detected by the Japan Sea earthquake and tsunami project (JSPJ) in the strike angle but not in the dip angle; the angles were more gradual. The slip distribution had two large slip areas on the east and west sides of the hypocenter. The model also indicated that the eastern part of the fault, or the fault buried under the sea floor, generated the tsunami which was dominant east of the peninsula. 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