Solid Earth Sciences(S)
Session Sub-categoryComplex & General(CG)
Session IDS-CG61
TitleThe Japan Trench: Learning from the 2011 M=9 Tohoku-Oki earthquake, a decade later
Short TitleThe decade after the Tohoku earthquake
Main Convener NameTakeshi Iinuma
AffiliationNational Research and Development Agency Japan Agency for Marine-Earth Science and Technology
Co-Convener 1NameAsuka Yamaguchi
AffiliationAtomosphere and Ocean Research Institute, The University of Tokyo
Co-Convener 2NameAitaro Kato
AffiliationEarthquake Research Institute, the University of Tokyo
Co-Convener 3NameTianhaozhe Sun
AffiliationPennsylvania State University Main Campus
Session LanguageE
ScopeThe 2011 Tohoku-Oki earthquake (M=9) and its devastating tsunami triggered numerous new studies of earthquake processes in the northeast Japan subduction zone and worldwide. Multidisciplinary data in great quality and quantity have been collected across the shoreline during and since the earthquake. Important offshore observations include seafloor mapping, sub-seafloor geophysical imaging, coring, logging, and laboratory measurements associated with ocean drilling, GNSS-acoustic measurements of crustal deformation in and beyond the rupture area at an increasing number of sites, and multi-dataset geophysical observations by the newly established cabled seafloor monitoring network (the S-net) that covers the entire offshore area of the margin. Many geophysical and geological studies such as seismological and geodetic analyses, field surveys on fault-zone, regional and margin-wide structures, laboratory experiments on fault-zone and wall rock properties, and the associated numerical modeling have been conducted to investigate the preparation and generation of the M=9 rupture, its postseismic deformation, and its impacts on the general margin geodynamics. Today, approaching a decade from the earthquake, we need to synthesize these results to summarize what we have learned, what is still unknown, and what new studies should be conducted in the future. In this session, we welcome presentations on all aspects of the 2011 Tohoku-Oki earthquake and the seismogenic processes in the Japan Trench and other subduction margins based on, but not limited to, geophysical and geological field observations, laboratory experiments, and modeling studies.
Presentation FormatOral and Poster presentation