[M-IS33_30AM1] How to evaluate the potential for megaquake and tsunami from onsite observations before the events?

Wed. Apr 30, 2014 9:00 AM - 10:45 AM 501 (5F)

Convener:*Yoshihiro Ito(Disaster Prevention Research Institute, Kyoto University), Kiichiro Kawamura(Graduate School of Sciences and Engineers, Yamaguchi University), Takeshi Tsuji(International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University), Chair:Yoshihiro Ito(Disaster Prevention Research Institute, Kyoto University), Kiichiro Kawamura(Graduate School of Sciences and Engineers, Yamaguchi University), Takeshi Tsuji(International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University)

Many studies have shown that geological, geophysical, geochemical and biological disturbances had been caused by the 2011 Tohoku-Oki earthquake (M9) around its focal region. These onsite evidences demonstrated the importance of interdisciplinary observations to evaluate a potential for megaquake and tsunami at the possible scene of a megaquake region. In this session, we discuss how we assess the potential of megaquake and large-tsunami from geochemical and biological observations as well as geological and geophysical ones at trench site, landward seafloor slope and on-shore region.

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9:00 AM - 9:15 AM

[MIS33-01] Comparison of seabeds at < 2000 m in water depth off Miyagi before and after the 2011 Tohoku-Oki earthquake

Ayaka WADA¹, *Kiichiro KAWAMURA¹, Miriam ROMER², Michael STRASSER³, Hiske FINK², Kazuno ARAI⁴, Ryota HINO⁵, Yoshihiro ITO⁶, Katsunori FUJIKURA⁷ (1.Yamaguchi University, 2.University of Bremen, 3.ETH Zurich, 4.Chiba University, 5.Tohoku University, 6.Kyoto University, 7.JAMSTEC)

9:15 AM - 9:30 AM

★ [MIS33-02] Evidence of Tohoku-oki earthquake in the deep sea sediment

*Toshiya KANAMATSU¹, Ken IKEHARA², Kazuko USAMI² (1.Japan Agency for Marine-Earth Science and Technology, 2.Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Techn)

9:30 AM - 9:45 AM

[MIS33-03] Turbidites collected from the Japan Trench inner slope, during the NT13-19 cruise

*Kazuko USAMI¹, Ken IKEHARA¹, Cecilia MCHUGH², Toshiya KANAMATSU³ (1.Geological Survey of Japan, AIST, 2.JAMSTEC / Queens College, C.U.N.Y., 3.JAMSTEC)

9:45 AM - 10:00 AM

★ [MIS33-04] Tsunami-generated turbidite as a proxy for large-scale earthquakes

Hajime NARUSE¹, *Kazuno ARAI² (1.Graduate School of Science, Kyoto University, 2.Graduate School of Science, Chiba University)

10:00 AM - 10:15 AM

[MIS33-05] An abrupt seafloor water-temperature increase in the epicentral region of the 2011 Tohoku earthquake

*Daisuke INAZU¹, Yoshihiro ITO², Demian SAFFER³, Ryota HINO⁴ (1.NIED, 2.Kyoto University, 3.The Pennsylvania State University, 4.Tohoku University)

10:15 AM - 10:30 AM

[MIS33-06] A sedimentological and paleomagnetic study of deep-sea sediments collected from the Sagami trough

*Arata NAKAJIMA¹, Kiichiro KAWAMURA¹, Toshiya KANAMATSU², Saneatsu SAITO², Masafumi MURAYAMA³ (1.Yamaguchi University, 2.JAMSTEC, 3.Kochi University)

10:30 AM - 10:45 AM

[MIS33-07] DEVELOPMENT OF MULTI-PARAMETER BOREHOLE SYSTEM TO EVALUATE THE EXPECTED LARGE EARTHQUAKE ?N THE MARMARA SEA, TURKEY

*Oguz OZEL¹, Cansun GURALP², Stefano PAROLAI³, Michel BOUCHON⁴, Hayrullah KARABULUT⁵, Mustafa AKTAR⁵, Nurcan MERAL OZEL⁵ (1.Istanbul University-Turkey, 2.Guralp Systems-UK, 3.Geoforsungszentrum-Germany, 4.CNRS-France, 5.Kandilli Observ. & Earthq. Res. Inst.-Turkey)