[S-SS02] Frontier studies on subduction zone megathrust earthquakes and tsunamis

Tue. May 24, 2016 9:00 AM - 10:30 AM IC (2F)

Convener:*Kyuichi Kanagawa(Graduate School of Science, Chiba University), Demian Saffer(Department of Geosciences, The Pennsylvania State University, USA), Michael Strasser(University of Innsbruck), James Kirkpatrick(McGill University), Shuichi Kodaira(R&D Center for Earthquake and Tsunami Japan Agency for Marine-Earth Science and Technology), Ryota Hino(Graduate School of Science, Tohoku University), Yasuhiro Yamada(Japan Agency for Marine-Earth Science and Technology (JAMSTEC), R&D Center for Ocean Drilling Science (ODS)), Kohtaro Ujiie(Graduate School of Life and Environmental Sciences, University of Tsukuba), Yoshihiro Ito(Disaster Prevention Research Institute, Kyoto University), Chair:Kohtaro Ujiie(Graduate School of Life and Environmental Sciences, University of Tsukuba), Yasuhiro Yamada(Japan Agency for Marine-Earth Science and Technology (JAMSTEC), R&D Center for Ocean Drilling Science (ODS))

Subduction zone megathrust earthquakes and their accompanying tsunamis, such as the Tohoku-oki earthquake on March 11 in 2011, have caused severe damage in the past. Scientists have worked for decades to understand these devastating events, mostly based on seismic, tsunami and geodetic observations. In addition to these remote monitoring studies, the challenge of drilling into and directly sampling megathrust faults at seismogenic depth, analysis of drill core and downhole logs, experiments on sampled fault materials, and borehole measurements at depth has recently been taken up or being planned by the Integrated Ocean Drilling or International Ocean Discovery Program at Nankai Trough (Nankai Trough Seismogenic Zone Experiment), Japan Trench (Japan Trench Fast Drilling Project and Tracking Tsunamigenic Slips in the Japan Trench), offshore Costa Rica (Costa Rica Seismogenesis Project), Sunda Trench (Sumatra Seismogenic Zone Expedition), and at the Hikurangi margin (Unlocking the Secrets of Slow Slip). In this session, we welcome presentations based on such frontier studies, in addition to those based on seismic, tsunami and geodetic observations, numerical modeling, and analyses of fault rocks exhumed from seismogenic depth.

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9:00 AM - 9:15 AM

[SSS02-01] Accelerated nucleation of the 2014 Iquique, Chile Mw 8.2 Earthquake

*Aitaro Kato¹, Jun'ichi Fukuda², Takao Kumazawa³, Shigeki Nakagawa² (1.Graduate School of Environmental Studies, Nagoya University, 2.Earthquake Research Institute, the University of Tokyo, 3.The Institute of Statistical Mathematics)

9:15 AM - 9:35 AM

[SSS02-02] Past slip to the trench recorded in Central America and its global significance

★Invited papers

*Paola Vannucchi¹, Elena Spagnuolo², Kohtaro Ujiie³, Akito Tsutsumi⁴, Stefano Aretusini², Yuka Namiki⁴, Giulio di Toro⁵ (1.Royal Holloway University of London, 2.INGV, 3.Tsukuba University, 4.Kyoto University, 5.Manchester University)

9:35 AM - 9:50 AM

[SSS02-03] Sediment consolidation affected by uplift, mass movement, and fluid-interaction in the Costa Rica forearc wedge

*Mari Hamahashi¹, Elizabeth Screaton², Wataru Tanikawa³, Yoshitaka Hashimoto⁴, Kylara Martin⁵, Saneatsu Saito⁶, Gaku Kimura¹ (1.Department of Earth and Planetary Science, The University of Tokyo, 2.Department of Geological Sciences, University of Florida, 3.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 4.Department of Applied Science, Kochi University, 5.Naval Research Laboratory, 6.Research and Development Center for Ocean Drilling Science, Japan Agency for Marine-Earth Science and Technology)

9:50 AM - 10:10 AM

[SSS02-04] Heat flow at the Cascadia, USA, and the Hikurangi, New Zealand, margins

★Invited papers

*Robert N Harris¹, Marie Salmi², Anson Antriasian¹, Anne Trehu¹, H. Paul Johnson² (1.Oregon State University, 2.University of Washington)

10:10 AM - 10:30 AM

[SSS02-05] Sumatra Seismogenic Zone: IODP Expedition 362 Overview

★Invited papers

*Lisa Clare McNeill¹, Brandon Dugan², Katerina Petronotis³ (1.University of Southampton, 2.Rice University, 3.Integrated Ocean Discovery Program, Texas A&M University)