Artigo Revisado por pares

Seismic- and Tsunami-Wave Propagation of the 2011 Off the Pacific Coast of Tohoku Earthquake as Inferred from the Tsunami-Coupled Finite-Difference Simulation

2013; Seismological Society of America; Volume: 103; Issue: 2B Linguagem: Inglês

10.1785/0120120118

ISSN

1943-3573

Autores

Takuto Maeda, Takashi Furumura, Shuji Noguchi, Shunsuke Takemura, Shin’ichi Sakai, Masahiro Shinohara, Kosuke Iwai, Shiann‐Jong Lee,

Tópico(s)

Seismic Waves and Analysis

Resumo

Research Article| May 01, 2013 Seismic‐ and Tsunami‐Wave Propagation of the 2011 Off the Pacific Coast of Tohoku Earthquake as Inferred from the Tsunami‐Coupled Finite‐Difference Simulation Takuto Maeda; Takuto Maeda Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japanmaeda@eri.u-tokyo.ac.jp *Also at Center for Integrated Disaster Information Research, Interfaculty Initiative in Information Studies, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan. Search for other works by this author on: GSW Google Scholar Takashi Furumura; Takashi Furumura Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japanmaeda@eri.u-tokyo.ac.jp *Also at Center for Integrated Disaster Information Research, Interfaculty Initiative in Information Studies, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan. Search for other works by this author on: GSW Google Scholar Shinako Noguchi; Shinako Noguchi Central Research Institute for Electric Power Industry, 1646 Abiko, Abiko‐shi, Chiba 270‐1194, Japan Search for other works by this author on: GSW Google Scholar Shunsuke Takemura; Shunsuke Takemura Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan †Now at Yokohama City University, Japan. Search for other works by this author on: GSW Google Scholar Shin'ichi Sakai; Shin'ichi Sakai Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan Search for other works by this author on: GSW Google Scholar Masanao Shinohara; Masanao Shinohara Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan Search for other works by this author on: GSW Google Scholar Kazuhisa Iwai; Kazuhisa Iwai Center for Integrated Disaster Information Research, Interfaculty Initiative in Information Studies, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan ‡Now at Japan Patent Office. Search for other works by this author on: GSW Google Scholar Shiann‐Jong Lee Shiann‐Jong Lee Institute of Earth Sciences, Academia Sinica, 128, Sec. 2, Academia Road, Nangang, Taipei 11529, Taiwan Search for other works by this author on: GSW Google Scholar Author and Article Information Takuto Maeda *Also at Center for Integrated Disaster Information Research, Interfaculty Initiative in Information Studies, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan. Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japanmaeda@eri.u-tokyo.ac.jp Takashi Furumura *Also at Center for Integrated Disaster Information Research, Interfaculty Initiative in Information Studies, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan. Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japanmaeda@eri.u-tokyo.ac.jp Shinako Noguchi Central Research Institute for Electric Power Industry, 1646 Abiko, Abiko‐shi, Chiba 270‐1194, Japan Shunsuke Takemura †Now at Yokohama City University, Japan. Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan Shin'ichi Sakai Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan Masanao Shinohara Earthquake Research Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan Kazuhisa Iwai ‡Now at Japan Patent Office. Center for Integrated Disaster Information Research, Interfaculty Initiative in Information Studies, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan Shiann‐Jong Lee Institute of Earth Sciences, Academia Sinica, 128, Sec. 2, Academia Road, Nangang, Taipei 11529, Taiwan Publisher: Seismological Society of America First Online: 14 Jul 2017 Online ISSN: 1943-3573 Print ISSN: 0037-1106 Bulletin of the Seismological Society of America (2013) 103 (2B): 1456–1472. https://doi.org/10.1785/0120120118 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 Takuto Maeda, Takashi Furumura, Shinako Noguchi, Shunsuke Takemura, Shin'ichi Sakai, Masanao Shinohara, Kazuhisa Iwai, Shiann‐Jong Lee; Seismic‐ and Tsunami‐Wave Propagation of the 2011 Off the Pacific Coast of Tohoku Earthquake as Inferred from the Tsunami‐Coupled Finite‐Difference Simulation. Bulletin of the Seismological Society of America 2013;; 103 (2B): 1456–1472. doi: https://doi.org/10.1785/0120120118 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 The 2011 Tohoku earthquake (M 9.0) caused significant hazards including strong ground motion, coseismic ground deformation, and tsunamis. For a deeper understanding of these phenomena, we conducted a large‐scale, parallel computer simulation by means of the finite‐difference method (FDM) with newly developed tsunami‐coupled equations of motion. This method is based on the equations of motion for an elastic medium, treating seawater as elastic material having zero S‐wave velocity. Tsunami waves are included by taking into account gravity and their equilibrium with the pressure gradient. An effective method of FDM simulation using the state‐of‐the‐art massively parallelized K computer is also studied. With the use of a 3D layered velocity structure that includes topography and bathymetry, basement structure, Moho depth, and plate boundaries, and use of the appropriate source‐rupture model based on joint inversion of seismic waves and geodetic observations, the simulated seismic waves demonstrate anomalous seismic‐wave propagation by the thick 3D basin structure inland. We also found that the sea column acts as a strong absorber of seismic waves for shallow up‐dip slip. On the ocean side, coseismic deformation and tsunamis are dynamically generated in this simulation. Tsunami attacks on the subsided Pacific coast are simulated without any additional assumptions. We also modeled the tsunami and seismic records of ocean‐bottom pressure gauges above the fault. Because sea‐bottom tsunami and seismic observation is powerful but very complex, recording both seismic and tsunami waves, the use of these coupled numerical simulations has great potential for resolving complex source fault rupture processes in a 3D heterogeneous structure.Online Material: Mpeg movies of fault slip, seismic‐wave propagation, seafloor and ground displacement, and tsunamic propagation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

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