Abstract:Using the P-wave travel time of seismic data processed by the double difference tomography method, we obtain hypocenter relocation results and P-wave velocity structure within the range of 0~200 km beneath the Japan-Kuril trench subduction zone. This divides the Japan-Kuril trench subduction zone into the north of the Japan trench subduction zone and the south of the Kuril trench subduction zone. The Pacific plate is continuous within the depth of 200 km. Combining bathymetric with fracture feature data, we identify the fracture classification of the Japan-Kuril trench subduction zone.