[S-SS04] [EE] Subduction zone dynamics from regular earthquakes through slow earthquakes to creep

Thu. May 25, 2017 10:45 AM - 12:15 PM A10 (Tokyo Bay Makuhari Hall)

convener:Kyuichi Kanagawa(Graduate School of Science, Chiba University), Kazushige Obara(Earthquake Research Institute, The University of Tokyo), Demian M Saffer(Pennsylvania State University), Laura Wallace(University of Texas Institute for Geophysics), Chairperson:Shuichi Kodaira(R&D Center for Earthquake and Tsunami Japan Agency for Marine-Earth Science and Technology), Chairperson:Ryota Hino(Graduate School of Science, Tohoku University)

Recent seismic and geodetic studies have revealed a variety of phenomena along subduction zone megathrusts, ranging from creep to earthquakes, including slow slip transients collectively known as slow earthquakes. This session aims to build on a growing and increasingly comprehensive understanding of the dynamics of this wide range of phenomena, based on results from a wide range of disciplines including observational geodesy and seismology, geological and geophysical studies of present and ancient subduction zones, borehole logging and monitoring, laboratory experiments, and theoretical and numerical modeling. We welcome presentations on, but not limited to, spatial and temporal distributions, geometry, source parameters and conditions, characteristic structures and material properties, and mechanics and mechanisms of a variety of phenomena occurring along subduction zone megathrusts, as well as on upper plate faults, and at trench axes and outer rises.

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10:45 AM - 11:00 AM

[SSS04-25] Seismic images from the outer rise to the Japan Trench for site characterization of new IODP subduction zone drilling projects

*Shuichi Kodaira¹, Yasuyuki Nakamura¹, Gou Fujie¹, Koichiro Obana¹, Tetsuo No¹, Toshiya Fujiwara¹, Seiichi Miura¹ (1.R&D Center for Earthquake and Tsunami Japan Agency for Marine-Earth Science and Technology)

11:00 AM - 11:15 AM

[SSS04-26] Could decadal variations in the ocean accelerate plate subduction in the Japan Trench before the 2011 M9 Tohoku earthquake?

*Yoshiyuki Tanaka¹, Suguru Yabe², Satoshi Ide² (1.Earthquake Research Institute, The University of Tokyo, 2.Department of Earth and Planetary Science, The University of Tokyo)

11:15 AM - 11:30 AM

[SSS04-27] Along-strike segmentation of Japan Trench and its relevance to co- and postseismic slip of the 2011 Tohoku Earthquake

*Ryota Hino¹, Shuichi Kodaira², Toshiya Kanamatsu², Masanao Shinohara³, Yoshihiro Ito⁴ (1.Graduate School of Science, Tohoku University, 2.JAMSTEC, 3.Earthquake Research Institute, University of Tokyo, 4.Disaster Prevention Research Center, Kyoto University)

11:30 AM - 11:45 AM

[SSS04-28] Spatio-temporal variation of the postseismic deformation of the 2011 Tohoku Earthquake based on terrestrial and seafloor observations

*Takeshi Iinuma¹, Yusaku Ohta², Satoshi Miura^2,4, Jun Muto^3,4, Fumiaki Tomita², Motoyuki Kido^4,2, Ryota Hino^2,4 (1.Japan Agency for Marine-Earth Science and Technology, 2.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 3.Department of Earth Science, Graduate School of Science, Tohoku University, 4.International Research Institute of Disaster Science, Tohoku University)

11:45 AM - 12:00 PM

[SSS04-29] Sequential activation of reverse and normal faulting in the upper plate during the 2011 Tohoku earthquake

*Shiqing Xu¹, Eiichi Fukuyama¹, Han Yue², Jean-Paul Ampuero² (1.NIED, Japan, 2.Caltech, USA)

12:00 PM - 12:15 PM

[SSS04-30] Laboratory insights into the wide range of slip behavior on the Tohoku plate boundary megathrust

★Invited papers

*Matt Ikari¹, Yoshihiro Ito^2,4, Kohtaro Ujiie^3,4, Achim Kopf¹ (1.MARUM, University of Bremen, 2.Kyoto University, 3.University of Tsukuba, 4.JAMSTEC)

Session information