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

Wed. May 24, 2017 1:45 PM - 3:15 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:Kohtaro Ujiie(Graduate School of Life and Environmental Sciences, University of Tsukuba), Chairperson:Kyuichi Kanagawa(Graduate School of Science, Chiba 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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1:45 PM - 2:00 PM

[SSS04-13] Frontal thrust activity of the Nankai accretionary prism off the Kii Peninsula

*Gaku Kimura¹, Harold Tobin², Masataka Kinoshita³ (1.Tokyo University of Marine Science and Technology, 2.University of Wisconsin-Madison, 3.Earthquake Research Institute, The University of Tokyo)

2:00 PM - 2:15 PM

[SSS04-14] Estimates of the geothermal gradient in the deep Nankai accretionary prism, Site C0002, Expedition 348

*James C Sample¹, Sarah Weeks¹, Glen Spinelli², Robert N Harris³, Xianfeng Wang⁵, William Defliese⁴, Aradhna Tripati⁴ (1.Northern Arizona Univ., 2.New Mexico Tech Univ, 3.Oregon State Univ, 4.Univ California, Los Angeles, 5.Nanyang Tech Univ)

2:15 PM - 2:30 PM

[SSS04-15] Frictional properties of the Nankai Trough accretionary mud samples collected and cored from 944.6–3030.5 mbsf at IODP Site C0002

*Kyuichi Kanagawa¹, Koki Hoshino², Kosuke Abe¹, Michiyo Sawai¹ (1.Graduate School of Science, Chiba University, 2.Central Japan Railway Company)

2:30 PM - 2:45 PM

[SSS04-16] Transition of frictional velocity dependence of subduction zone fault material as a function of effective normal stress

*Akito Tsutsumi¹, Saki Higa¹, Yuka Namiki¹ (1.Graduate School of Science, Kyoto University)

2:45 PM - 3:00 PM

[SSS04-17] Excess fluid pressure development beneath the décollement at the Nankai subduction zone

*Takehiro Hirose¹, Nana Kamiya², Yuzuru Yamamoto¹, Verena Heuer³, Fumio Inagaki¹, Yuki Morono¹, Yusuke Kubo¹, Expedition 370 Scientists (1.Japan Agency for Marine-Earth Science and Technology, 2.Nihon University, 3.University of Bremen)

3:00 PM - 3:15 PM

[SSS04-18] The role of input materials in shallow seismogenic slip at subduction zones: Initial results from IODP Expedition 362, North Sumatra

★Invited papers

*Lisa Clare McNeill¹, Brandon Dugan², Katerina Petronotis³, IODP Expedition 362 Scientists³ (1.Ocean and Earth Science, University of Southampton, 2.Department of Geophysics, Colorado School of Mines, 3.IODP, Texas A&M University)

Session information