| Solid Earth Sciences(S) |
| Session Sub Category |
Seismology(SS)
|
| Session ID |
S-SS01
|
| Title |
Slip to the Trench in Megathrust Earthquakes
|
| Short title |
Slip to the Trench
|
| Convener |
Name |
Shuichi Kodaira
|
| Affiliation |
Institute for Research on Earth Evolution
Japan Agency for Marine-Earth Science and Technology
|
|
Co-convener 1.
|
Name |
James Mori
|
| Affiliation |
Earthquake Hazards Division, Disaster Prevention Research Institute, Kyoto University
|
|
Co-convener 2.
|
Name |
Kohtaro Ujiie
|
| Affiliation |
Graduate School of Life and Environmental Sciences, University of Tsukuba
|
|
Co-convener 3.
|
Name |
Kelin Wang
|
| Affiliation |
Geological Survey of Canada
|
|
Co-convener 4.
|
Name |
Michael Strasser
|
| Affiliation |
Geological Institute, ETH Zurich
|
|
Co-convener 5.
|
Name |
Demian Saffer
|
| Affiliation |
Department of Geoscience, The Pennsylvania State University
|
| International Symposium |
'International Symposium' in addition to Scientific session.
|
| Language |
English
|
| Scope |
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.
|
| Type of presentation |
Oral and Poster presentation
|
| Invited papers |
James Kirkpatrick (Univ. California Santa Cruz)
SHIMAMOTO, Toshi ( Institute of Geology China Earthquake Administration)
Matt Ikari (MARUM Univ. Bremen)
IKEHARA, Ken (AIST, Geological Survey of Japan)
|