[SCG57-P05] 3D velocity model in the region of Nankai Trough
Keywords:3D velocity model , Nankai Trough, subduction zone
The Nankai Trough, where the Philippine sea plate is subducting beneath the Eurasian plate. Some seamounts and ridges are subducted here.
3D velocity model was constructed by seismic data and ocean bottom seismometer(OBS) refraction survey data which were obtained by a various agencies and private companies. Horizons such as acoustic basment and unconformity were interpreted using reflection seismic sections. Conrad discontinuity and Mohorovicic discontinuity were interpreted on refraction surveys and consulted previous study. Layer structure and velocity model were created on these horizons.
We obtain a result that understands geological structure in Nankai Trough. So in this session, we will take a discussion concerning structural characteristic based on the 3D velocity model.