[S-CG59] Structure and evolution of Japanese islands - Formation of island arc systems and earthquake cycles

Tue. May 22, 2018 9:00 AM - 10:30 AM A05 (Tokyo Bay Makuhari Hall)

convener:Hiroshi Sato(Earthquake Prediction Research Center, Earthquake Research Institute, The University of Tokyo), Masanao Shinohara(Earthquake Research Institute, University of Tokyo), Masahiro Ishikawa(横浜国立大学大学院環境情報研究院, 共同), Makoto MATSUBARA(National Research Institute for Earth Science and Disaster Resilience), Chairperson:Shinohara Masanao(Earthquake Research Institute, The University of Tokyo), Ishikawa Masahiro(Yokohama National University)

Subduction processes such as accretion, back-arc-spreading, and arc-arc collisions have shaped the Japanese island arc. Recent advances in seismic imaging, both passive and controlled source, have produced new images of the crust-mantle structure under Japan and surrounding regions. Through the influence of pre-existing faults and rheological structures, these crust and mantle structures are exerting strong control on active tectonic processes like seismic activity and crustal deformation in the overriding plate. We seek contributions that document and/or model the deformation of the Japanese islands over a variety of time scales from the earthquake cycle to the tectonic evolution of the Japanese island arc, and from a range of research fields including seismology, geology, geochemistry, tectonic geomorphology, and geodynamics. Multidisciplinary studies are encouraged. We also welcome contributions in numerical or analogue geodynamical modeling that explore deformation processes.

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9:00 AM - 9:15 AM

[SCG59-01] Construction of the structure model of Japanese islands for the evaluation of earthquake potential

*Hiroshi Sato¹, Tatsuya Ishiyama¹, Akinori Hashima¹, Takaya Iwasaki¹, Makoto MATSUBARA², Masanao Shinohara¹, Masahiro Ishikawa³ (1.Earthquake Prediction Research Center, Earthquake Research Institute, The University of Tokyo, 2.National Research Institute for Earth Science and Disaster Resilience, 3.Yokohama National University, School of Environment and Information Sciences )

9:15 AM - 9:30 AM

[SCG59-02] Deep crustal and uppermost mantle lithology of the Honshu arc

*Masahiro Ishikawa¹ (1.Graduate School of Environment and Information Sciences Yokohama National University)

9:30 AM - 9:45 AM

[SCG59-03] Crustal seismogenic layer beneath Japanese Islands estimated from high resolved hypocenter catalog and heat flux data

*Tomoko Elizabeth Yano¹, Makoto MATSUBARA¹ (1.National Research Institute of Earth Science and Disaster Resilience)

9:45 AM - 10:00 AM

[SCG59-04] Detailed structures of the subducted Philippine Sea plate and the overriding SW Japan arc – New findings from reinterpretation of previously obtained seismic data with modern processing techniques-

*Takaya Iwasaki¹, Eiji Kurashimo¹, Susumu Abe², Ken Yokota³, Takashi Iidaka¹, Hiroshi Katao⁴, Motonori Higasshinaka³, Kiyoshi Ito⁵, Naoshi Hirata¹, Hiroshi Sato¹, Tanio Ito⁶, Ayako Nakanishi⁷, Yoshiyuki Kaneda⁸ (1.Eathquake Research Institute, the University of Tokyo, 2.JAPEX, 3.JGI, Inc., 4.DPRI, Kyoto University, 5.HANSHIN CONSULTANTS Co., Ltd., 6.Meiji University, 7.JAMSTEC, 8.IECMS, Kagawa University)

10:00 AM - 10:15 AM

[SCG59-05] Crustal structure in the margin of the northern Japan Sea back-arc basin off NW Hokkaido deduced from the seismic survey

*Takeshi Sato¹, Tetsuo No¹, Shuichi Kodaira¹, Seiichi Miura¹, Tatsuya Ishiyama², Hiroshi Sato² (1.Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology, 2.ERI, Univ. of Tokyo)

10:15 AM - 10:30 AM

[SCG59-06] Active Tectonics of the frontal Hidaka fold-and-thrust belt in the Ishikari foreland basin based on deep to shallow seismic reflection profiling, Hokkaido, Japan

*Tatsuya Ishiyama¹, Hiroshi Sato¹, Naoko Kato¹, Susumu Abe² (1.Earthquake Research Institute, University of Tokyo, 2.Japan Petroleum Exploration Co., Ltd.)

Session information