Takashi Miyazaki¹, Tomoki Sato¹, Yoshihiko Tamura², Cedric Hamelin³, James B Gill⁴, Susan M DeBari⁵, Jun-Ichi Kimura², Bogdan Vaglarov⁶, Qing Chang⁶, Ryoko Senda⁷ and Satoru Haraguchi⁸, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)JAMSTEC, Yokosuka, Japan, (3)University of Bergen, Bergen, Norway, (4)Univ Califonia Santa Cruz, Santa Cruz, CA, United States, (5)Western Washington University, Bellingham, WA, United States, (6)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Geodynamics (IMG), Kanagawa, Japan, (7)Kyushu University, Fukuoka, Japan, (8)Earthquake Research Institute, the University of Tokyo, Tokyo, Japan