Title: Short-Period Source Model of the 2011 Mw 9.0 Off the Pacific Coast of Tohoku Earthquake
Abstract: Research Article| May 01, 2013 Short‐Period Source Model of the 2011 Mw 9.0 Off the Pacific Coast of Tohoku Earthquake Susumu Kurahashi; Susumu Kurahashi Aichi Institute of Technology, 1247 Yachigusa, Yakusa‐cho, Toyota‐shi, Aichi 470‐0392, [email protected] Search for other works by this author on: GSW Google Scholar Kojiro Irikura Kojiro Irikura Disaster Prevention Research Center, Aichi Institute of Technology, 1247 Yachigusa, Yakusa‐cho, Toyota‐shi, Aichi 470‐0392, [email protected] Search for other works by this author on: GSW Google Scholar Bulletin of the Seismological Society of America (2013) 103 (2B): 1373–1393. https://doi.org/10.1785/0120120157 Article history first online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Susumu Kurahashi, Kojiro Irikura; Short‐Period Source Model of the 2011 Mw 9.0 Off the Pacific Coast of Tohoku Earthquake. Bulletin of the Seismological Society of America 2013;; 103 (2B): 1373–1393. doi: https://doi.org/10.1785/0120120157 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract We have constructed a short‐period source model for the 2011 Mw 9.0 Off the Pacific Coast of Tohoku earthquake using strong‐motion records at stations near the source fault. The observed strong motions contain five wavepackets that correspond to specific strong‐motion generation areas (SMGAs). The origins of the wavepackets were retrieved from the original seismograms using a semblance analysis. We determine the locations of the SMGAs based on sources extracted from the corresponding wavepackets. The short‐period source model consists of five SMGAs (SMGA1–5), which are located west of the hypocenter and along the down‐dip edge of the source fault. SMGA1 is located in the Miyagi‐Oki source region west of the hypocenter, SMGA2 in the middle Sanriku‐Oki source region north of the hypocenter, and SMGA3 in the southern Sanriku‐Oki source region west of the hypocenter. SMGA4 and SMGA5 are located near the down‐dip edge of the mainshock source fault, extending from offshore Fukushima prefecture to offshore Ibaraki prefecture. At some stations near the source fault, impulsive waves are also seen on the recorded seismograms. Ground motions corresponding to these impulsive waves cannot be accounted for using the conventional uniform SMGA model. We attempt instead to simulate the observed ground motions at the Onagawa Nuclear Power Plant at a depth of 128 m very near the source fault, using a heterogeneous source model. The impulsive waves are well simulated using the heterogeneous model with higher stress parameters within a small subarea inside the SMGAs. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 2013
Publication Date: 2013-05-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 63
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