[S-CG56] Ocean Floor Geosciences

Sun. May 26, 2019 1:45 PM - 3:15 PM A05 (TOKYO BAY MAKUHARI HALL)

convener:Kyoko Okino(Atmosphere and Ocean Research Institute, The University of Tokyo), Chairperson:Chie Honsho, Tadashi Ishikawa

Most of Earth's volcanism and much of its tectonic activity occur on and beneath the seafloor. Various phenomena on the seafloor are closely linked to plate tectonics, Earth and atmosphere. Seafloor rocks and sediments record Earth's evolution and heat and material fluxes on the Earth. Ocean Floor Geosciences session covers a broad range of research on LIPs, crustal movement and structure etc. Any fields of research and approach are welcomed. The session aims to encourage discussion among scientists from different study fields and to integrate our understanding of ocean floor. The session is co-chaired by K. Tadokoro (Nagoya Univ.), O. Ishizuka (AIST), T. Toki (Univ. Ryukyus), and N. Takahashi (JAMSTEC).

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1:45 PM - 2:00 PM

[SCG56-13] Offshore Postseismic Deformation of the 2011 Tohoku Earthquake Revisited: Application of an Improved GPS-Acoustic Positioning Method Considering Sloping Sound Speed Structure

*Chie Honsho¹, Motoyuki Kido², Fumiaki Tomita³, Naoki Uchida¹ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.International Research Institute of Disaster Science, Tohoku University, 3.Graduate School of Science, Hokkaido University)

2:00 PM - 2:15 PM

[SCG56-14] Comprehensive analysis for the forearc structure and dynamics by using the S-net data

*Naoki Uchida¹, Ryosuke Azuma¹, Akira Ishigami¹, Tomomi Okada¹, Ryota Takagi¹, Genti Toyokuni¹, Norihito Umino¹, Yusaku Ohta¹, Makiko Sato¹, Syuichi Suzuki¹, Hidenobu Takahashi¹, Kazuya Tateiwa¹, Dapeng Zhao¹, Takashi NAKAYAMA¹, Akira Hasegawa¹, Ryota Hino¹, Satoshi Hirahara¹, Toru Matsuzawa¹, Keisuke Yoshida¹ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions Graduate School of Science, Tohoku University)

2:15 PM - 2:30 PM

[SCG56-15] Shallow slow slip event inferred from GNSS-A seafloor geodesy

*Tadashi Ishikawa¹, Yusuke Yokota² (1.Hydrographic and Oceanographic Department, Japan Coast Guard, 2.Institute of Industrial Science, the University of Tokyo)

2:30 PM - 2:45 PM

[SCG56-16] Assessing strike-slip motion at the Shionomisaki Canyon along the Nankai oblique subduction zone using acoustic ranging system

*Motoyuki Kido¹, Eiichiro Araki², Takeshi Tsuji³, Ryusuke Yamamoto⁴, Yoshifumi Kawada¹ (1.International Research Institute for Disaster Science, Tohoku University, 2.JAMSTEC, 3.Dept. Earth Resources Engineering, Kyushu University, 4.School of Science, Tohoku University)

2:45 PM - 3:00 PM

[SCG56-17] Development of seafloor realtime observation network for crustal deformation in the Nankai Trough: tiltmeter installation

*Eiichiro Araki¹, Takashi Yokobiki¹, Toshinori Kimura¹, Shuhei Nishida¹, Yuya Machida¹, Shuichi Kodaira¹ (1.Japan Agency for Marine-Earth Science and Technology)

3:00 PM - 3:15 PM

[SCG56-18] Calibration of the DONET pressure sensor network in the Nankai trough seismogenic zone using a mobile pressure gauge

*Yuya Machida¹, Shuhei Nishida¹, Toshinori Kimura¹, Eiichiro Araki¹ (1.Japan Agency for Marine-Earth Science and Technology)

Session information