The Phillipine plate under thrusts dives toward the Eurasia plate in NWW direction, resulting in steep Moho interface and formation and development of the Okinawa trough, where the lithosphere is about 80km thick.

• 菲律宾板块沿北西西方向向欧亚板块俯冲 ,莫霍面急剧下插 ,导致冲绳海槽的形成与发展 ;