Spatio-temporal seismic velocity variation near the junction between Japan and Kuril trenches revealed from long-term dense-OBS network observation

Takehiro Sato1, Ryosuke Azuma1, Ryota Takagi1, Ryota Hino1 and Masanao Shinohara2, (1)Tohoku University, Graduate School of Science, Sendai, Japan, (2)Univ Tokyo, Tokyo, Japan