セッション概要

固体地球科学(S) セッション小記号 地震学(SS) セッションID S-SS01 タイトル 和文 Slip to the Trench in Megathrust Earthquakes 英文 Slip to the Trench in Megathrust Earthquakes タイトル短縮名 和文 Slip to the Trench 英文 Slip to the Trench 代表コンビーナ 氏名 和文 小平 秀一 英文 Shuichi Kodaira 所属 和文 海洋研究開発機構　地球内部ダイナミクス領域 英文 Institute for Research on Earth Evolution Japan Agency for Marine-Earth Science and Technology 共同コンビーナ 1 氏名 和文 Mori James 英文 James Mori 所属 和文 京都大学防災研究所地震防災研究部門 英文 Earthquake Hazards Division, Disaster Prevention Research Institute, Kyoto University 共同コンビーナ 2 氏名 和文 氏家 恒太郎 英文 Kohtaro Ujiie 所属 和文 筑波大学生命環境系 英文 Graduate School of Life and Environmental Sciences, University of Tsukuba 共同コンビーナ 3 氏名 和文 Kelin Wang 英文 Kelin Wang 所属 和文 Geological Survey of Canada 英文 Geological Survey of Canada 共同コンビーナ 4 氏名 和文 Michael Strasser 英文 Michael Strasser 所属 和文 Geological Institute, ETH Zurich 英文 Geological Institute, ETH Zurich 共同コンビーナ 5 氏名 和文 Demian Saffer 英文 Demian Saffer 所属 和文 Department of Geoscience, The Pennsylvania State University 英文 Department of Geoscience, The Pennsylvania State University 国際セッション開催希望 国際セッションとしての開催を希望する 発表主要言語 英語 スコープ 和文 Seismological, tsunami, and geodetic data of the 2011 Tohoku-oki earthquake indicate large slip of more than 50 m on the shallow part of the subduction megathrust. Coseismic slip reaching the trench has been inferred from comparisons of seismic and bathymetry images before and after the earthquake. At the Nankai Trough, ocean drilling provided frictional-heating evidence for seismic slip of a frontal thrust. In addition, anomalous slip of the shallow megathrust producing so-called tsunami earthquakes has occurred at several subduction zones. Recent friction experiments suggest that earthquake rupture propagates easily through velocity-strengthening materials by high-velocity weakening. These observations suggest a need to re-examine the widely accepted conceptual model of megathrust slip behavior, especially for the near-trench shallow portion. This session will integrate field observations, experimental results and modeling studies to understand seismic and aseismic slip of the shallow part of the subduction fault. 英文 Seismological, tsunami, and geodetic data of the 2011 Tohoku-oki earthquake indicate large slip of more than 50 m on the shallow part of the subduction megathrust. Coseismic slip reaching the trench has been inferred from comparisons of seismic and bathymetry images before and after the earthquake. At the Nankai Trough, ocean drilling provided frictional-heating evidence for seismic slip of a frontal thrust. In addition, anomalous slip of the shallow megathrust producing so-called tsunami earthquakes has occurred at several subduction zones. Recent friction experiments suggest that earthquake rupture propagates easily through velocity-strengthening materials by high-velocity weakening. These observations suggest a need to re-examine the widely accepted conceptual model of megathrust slip behavior, especially for the near-trench shallow portion. This session will integrate field observations, experimental results and modeling studies to understand seismic and aseismic slip of the shallow part of the subduction fault. 発表方法希望 口頭および（または）ポスターセッション 招待講演 James Kirkpatrick　(Univ. California Santa Cruz) Toshi Shimamoto ( Institute of Geology China Earthquake Administration) Matt Ikari (MARUM Univ. Bremen) Ken Ikehara (AIST, Geological Survey of Japan)