Geometry of plate boundary and seismic structure beneath the southern Ryukyu Trench subduction zone deduced from passive seismic observation

Yojiro Yamamoto1, Tsutomu Takahashi2, Yasushi Ishihara3, Yuka Kaiho1, Ryuta Arai3, Ayako Nakanishi2, Koichiro Obana1, Seiichi Miura2, Shuichi Kodaira4 and Yoshiyuki Kaneda5, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan, (3)JAMSTEC, Yokohama, Japan, (4)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan, (5)Nagoya University, Nagoya, Japan