Seismic velocity structure of the incoming Pacific Plate subducting into the central part of the Japan Trench revealed by traveltime tomography using OBS data

Koichiro Obana1, Gou Fujie1, Shuichi Kodaira2, Tsutomu Takahashi1, Yojiro Yamamoto1, Seiichi Miura1 and Masanao Shinohara3, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan, (3)Earthquake Research Institute, the University of Tokyo, Tokyo, Japan