Outline of Session

   

Solid Earth Sciences(S) / Seismology(SS) /  **International Session
S-SS02	Frontier studies on subduction zone megathrust earthquakes and tsunamis

Short title	Subduction zone earthquakes and tsunamis
Oral presentation Date/Room/Chair	May 25 AM1 (09:00 - 10:45)	IC	Ryota Hino  / Shuichi Kodaira
	May 25 AM2 (11:00 - 12:45)	IC	Yoshihiro Ito  / Yasuhiro Yamada
	May 25 PM1 (14:15 - 16:00)	IC	Michael Strasser  / Demian Saffer
	May 25 PM2 (16:15 - 18:00)	IC	Kohtaro Ujiie  / Kyuichi Kanagawa
Poster presentation Date/Room	May 25 (Core Time 18:15 - 19:30)	Convention Hall
Contact	Kyuichi Kanagawa
Email	kyu_kanagawa@faculty.chiba-u.jp
Convener	Kyuichi Kanagawa  / Demian Saffer  / Michael Strasser  / Yasuhiro Yamada  / Shuichi Kodaira  / Ryota Hino  / Kohtaro Ujiie  / Yoshihiro Ito
Scope	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), and at the Hikurangi margin. 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.
Notes

Time	Presentation No	Title	Author	Presenter	Abstract
Oral Presentation   May 25 AM1 (09:00-10:45) IC                              to the top
09:00 - 09:20	Invited SSS02-01	Determining slip near trench in the M 9 Tohoku-oki earthquake using bathymetry differences before and after the rupture	SUN, Tianhaozhe WANG, Kelin FUJIWARA, Toshiya other	SUN, Tianhaozhe	English
09:20 - 09:35	SSS02-02	Small low-frequency tremor coincident with slow slip events near the Japan Trench	ITO, Yoshihiro HINO, Ryota SUZUKI, Syuichi other	ITO, Yoshihiro	English
09:35 - 09:50	SSS02-03	In-Situ Observations of Earthquake-Driven Fluid Pulses within the Japan Trench Plate Boundary Fault Zone	FULTON, Patrick BRODSKY, Emly	FULTON, Patrick	English
09:50 - 10:05	SSS02-04	Study of the ocean physical data acquisition before and after the earthquake using the Argo float	GOTOH, Shinpei TSUCHIYA, Toshio HIYOSHI, Yoshihisa other	GOTOH, Shinpei	English
10:05 - 10:20	SSS02-05	Chemical fingerprints of earthquake event deposits in the Japan Trench	STRASSER, Michael FINK, Hiske IKEHARA, Ken other	STRASSER, Michael	English
10:20 - 10:35	SSS02-06	Linkages between pelagic sedimentation and plate-boundary faulting	UJIIE, Kohtaro TABATA, Hiroki KINOSHITA, Takahiro other	UJIIE, Kohtaro	English
10:35 - 10:45	3-min talk in an oral session (SSS02-P01/SSS02-P02/SSS02-P06)
Oral Presentation   May 25 AM2 (11:00-12:45) IC                              to the top
11:00 - 11:15	SSS02-07	Toward imaging fault zones of outer rise earthquakes succeeding a large megathrust earthquake in the Japan Trench	KODAIRA, Shuichi FUJIE, Gou NAKAMURA, Yasuyuki other	KODAIRA, Shuichi	English
11:15 - 11:30	SSS02-08	Proper selection of least squares parameters in tsunami waveform inversion through computational intelligence	MULIA, Iyan E. ASANO, Toshiyuki	MULIA, Iyan E.	English
11:30 - 11:45	SSS02-09	Rupture dynamics inferred from early stage of the 2011 great Tohoku-oki earthquake	ANDO, Ryosuke UCHIDE, Takahiko	UCHIDE, Takahiko	English
11:45 - 12:00	SSS02-10	Characteristics and waveform simulation for dynamic rupture model of the 2011 Tohoku earthquake with deep SMGAs	GALVEZ, Percy PETUKHIN, Anatoly IRIKURA, Kojiro other	PETUKHIN, Anatoly	English
12:00 - 12:15	SSS02-11	Possible Rupture Scenario for the Area Off-Ibaragi Prefecture in the 2011 Off the Pacific Coast of Tohoku Earthquake	TSUDA, Kenichi ISHII, Toru OGAWA, Sachio other	TSUDA, Kenichi	English
12:15 - 12:30	SSS02-12	Structural control on the nucleation of Nankai megathrust earthquakes	ZHAO, Dapeng LIU, Xin	ZHAO, Dapeng	English
12:30 - 12:45	SSS02-13	Hydrous state of the Philippine Sea plate inferred from receiver function analysis using onshore and offshore data	AKUHARA, Takeshi MOCHIZUKI, Kimihiro	AKUHARA, Takeshi	English
Oral Presentation   May 25 PM1 (14:15-16:00) IC                              to the top
14:15 - 14:35	Invited SSS02-14	Results from IODP Expedition 348: Deep Drilling Above the Plate Interface, Nankai Trough Subduction Zone	TOBIN, Harold HIROSE, Takehiro SAFFER, Demian	TOBIN, Harold	English
14:35 - 14:55	Invited SSS02-15	Seafloor monitoring for dynamics and stress state of the seismogenic plate interface in the Nankai Trough	ARAKI, Eiichiro KIMURA, Toshinori MACHIDA, Yuya other	ARAKI, Eiichiro	English
14:55 - 15:15	Invited SSS02-16	Estimation of in-situ stress and strength along the Nankai Trough subduction megathrust	KITAJIMA, Hiroko SAFFER, Demian	KITAJIMA, Hiroko	English
15:15 - 15:30	SSS02-17	Estimation of sediment friction coefficient from heating upon APC penetration during the IODP NanTroSEIZE	KINOSHITA, Masataka LIN, Weiren KAWAMURA, Kiichiro	KINOSHITA, Masataka	English
15:30 - 15:45	SSS02-18	Origin of mega-splay fault in subduction zone - out-of-sequence thrust or evolution gap in subduction	KIMURA, Gaku	KIMURA, Gaku	English
15:45 - 16:00	SSS02-19	Plate geometry, splay fault and tsunamigenic earthquake in the southernmost Ryukyu trench	ARAI, Ryuta KAIHO, Yuka TAKAHASHI, Tsutomu other	ARAI, Ryuta	English
Oral Presentation   May 25 PM2 (16:15-18:00) IC                              to the top
16:15 - 16:35	Invited SSS02-20	Unlocking the secrets of slow slip at the Hikurangi subduction margin	WALLACE, Laura SAFFER, Demian ITO, Yoshihiro other	WALLACE, Laura	English
16:35 - 16:50	SSS02-21	Physical property and Microstructure across the Seismic reflectors in the Upper plate of the Costa Rica Subduction zone	HAMAHASHI, Mari SCREATON, Elizabeth TANIKAWA, Wataru other	HAMAHASHI, Mari	English
16:50 - 17:05	SSS02-22	Rupture process of the 2014 Iquique, Chile earthquake estimated from tsunami waveforms, teleseismic, and GPS data	GUSMAN, Aditya MUROTANI, Satoko SATAKE, Kenji other	GUSMAN, Aditya	English
17:05 - 17:20	SSS02-23	Tsunami Hazards from secondary sources in the Makran Subduction Zone, northwestern Indian Ocean	HEIDARZADEH, Mohammad SATAKE, Kenji	HEIDARZADEH, Mohammad	English
17:20 - 17:35	SSS02-24	Microfault classification and difference in roughness with seismic cycles exampled from the Chelung-pu fault, Taiwan	HASHIMOTO, Yoshitaka KISHI, Shohei TOBE, Kota other	HASHIMOTO, Yoshitaka	English
17:35 - 17:50	SSS02-25	Dynamic weakening of smectite-bearing faults at subseismic slip rates	OOHASHI, Kiyokazu HIROSE, Takehiro TAKAHASHI, Miki other	OOHASHI, Kiyokazu	English
17:50 - 18:00	3-min talk in an oral session (SSS02-P07/SSS02-P09/SSS02-P10)

Presentation No	Title	Author	Presenter	Abstract
Poster Presentation   May 25  Core Time (18:15-19:30) Convention Hall                    to the top
SSS02-P01	Investigation of the Behavior of Shallow Parts of Mega-Thrust Earthquake Faults Based on Dynamic Rupture Simulations	TSUDA, Kenichi ISHII, Toru OGAWA, Sachio other	TSUDA, Kenichi	English
SSS02-P02	Epicenter determination by back-projecting onshore and offshore seismic data along the Japan Trench	NAKATANI, Yukihiro MOCHIZUKI, Kimihiro SHINOHARA, Masanao other	NAKATANI, Yukihiro	English
SSS02-P03	Structural characteristics observed on high resolution seismic profiles in the northern Japan Trench axis region	NAKAMURA, Yasuyuki KODAIRA, Shuichi YAMASHITA, Mikiya other	NAKAMURA, Yasuyuki	English
SSS02-P04	Mechanical and hydrological properties of incoming sediments at the Japan Trench and the weak-decollement evolution	SHIMIZU, Mayuko TANIKAWA, Wataru HAMADA, Yohei other	SHIMIZU, Mayuko	English
SSS02-P05	Frictional properties of subducting oceanic sediments and rocks at a shallow Japan Trench condition and slow slip rates	HOSHINO, Koki KANAGAWA, Kyuichi	HOSHINO, Koki	English
SSS02-P06	Clay minerals in the Nankai Trough accretionary sediments as a function of depth	HOSHINO, Koki KANAGAWA, Kyuichi	HOSHINO, Koki	English
SSS02-P07	Borehole stability discussion of NanTroSEIZE main-site, C0002	WU, Hungyu SANADA, Yoshinori KINOSHITA, Masataka other	WU, Hungyu	English
SSS02-P08	Incoming materials for an erosional subduction zone, offshore Osa Peninsula, Costa Rica	KAMEDA, Jun HARRIS, Robert SHIMIZU, Mayuko other	KAMEDA, Jun	English
SSS02-P09	Change in stress state in an on-land accretionary complex : implication for large stress drop with subduction earthquake	HASHIMOTO, Yoshitaka UEDA, Dai MOTOMIYA, Yuhei other	HASHIMOTO, Yoshitaka	English
SSS02-P10	Coseismic stress of ancient seismic fault of Median Tectonic Line at Mie Matsusaka, Japan	KOMETANI, Yusuke SHIGEMATSU, Norio SAKAGUCHI, Arito	KOMETANI, Yusuke	English