[S-CG57] Structure and evolution of Japanese islands - Formation of island arc systems and earthquake cycles

Wed. May 29, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Hiroshi Sato(Earthquake Prediction Research Center, Earthquake Research Institute, The University of Tokyo), Masanao Shinohara(Earthquake Research Institute, University of Tokyo), Masahiro Ishikawa(Graduate School of Environment and Information Sciences Yokohama National University), Makoto MATSUBARA(National Research Institute for Earth Science and Disaster Resilience)

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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[SCG57-P01] Crustal structure from the Japan Sea back-arc basin to the margin off SW 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)

[SCG57-P02] Three-dimensional plate geometry model from the Nankai to the Ryukyu subduction zone

*Ayako Nakanishi¹, Tsutomu Takahashi¹, Yojiro Yamamoto¹, Mikiya Yamashita¹, Minako KATSUYAMA¹, Seiichi Miura¹, Narumi Takahashi^3,1, Hiromi Kamata¹, Shuichi Kodaira¹, Yoshiyuki Kaneda^2,1 (1.Japan Agency for Marine-Earth Science and Technology, 2.Kagawa University, 3.National Research Institute for Earth Science and Disaster Resilience)

[SCG57-P03] Trace elements and Sr-Nd-Hf-Pb isotopic composition of Miocene Tomari volcanic rocks, Shimokita Peninsula, Aomori, NE Japan

*Masataka Aizawa¹, Mitsuru Inaba², Satoshi Okamura^3,4, Ryuichi Shinjo⁵ (1.Graduate School of Engineering and Sience, University of Ryukyus, 2.GeoPuck Association, 3.Hokkaido Education University, 4.Hokkaido Soil Research Co-op., 5.Faculty of Science, University of Ryukyus)

[SCG57-P04] Acceleration of oceanic plate following megathrust earthquakes

*Mohammad Yuzariyadi¹, Kosuke Heki¹ (1.Hokkaido University)

[SCG57-P05] 3D velocity model in the region of Nankai Trough

*Minako KATSUYAMA¹, Ayako Nakanishi¹, Rei Arai¹, Shigeyoshi Tanaka¹, Narumi Takahashi², Hiromi Kamata¹, Yoshiyuki Kaneda³ (1.Japan Agency for Marine-Earth Science and Technology, 2.National Research Institute for Earth Science and Disaster Resilience, 3.Kagawa University)

[SCG57-P06] Depth of seismogenic layer at the 2018 North Osaka and the 2018 Hokkaido Eastern Iburi earthquake sites

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

[SCG57-P07] Seismic reflection profiling across the Median Tectonic Line (MTL) active fault system in Ehime and Tokushima Prefectures

*Naoko Kato¹, Tatsuya Ishiyama¹, Hiroshi Sato¹, Shin Koshiya², Taro Koike³, Katsuya Noda³ (1.Earthquake Research Institute,University of Tokyo, 2.Faculty of science and engineering, Iwate University, 3.Geosys, Inc.)

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