关键词: 俯冲带, 应力场, 板块运动, 地震机制解, 台湾, 菲律宾

Abstract: Abstract The spatial distribution of m_b≥5.0 earthquakes and their focal mechanis solutions havebeen studied for the southern Taiwan─philippines area by use of ISC seismic data,as well as thepatterns of the subduction zone and the stress state in the crust and subduction zone along withthe other resuIts from the geophysical studies.It is considered that the eastern boundarv of theSouth China Sea plate consists of such subduction zones as southwestern Taiwan,Manila,Negrosand Cotabato.The western boundarv of the Philippines plate consists of the subduction zones ofEast Lazon trough and Plilippine Sea.The Philippine Islands are a transitional zone of being deformed.In the presence of that transitional zone,the South China Sea subplate has subducted beneath the Philippine Islands and the Philippine plate has a weak effect on the southern part.Key works：Subduction zone,Stress field,Plate movement,Focal mechanism solution,Taiwan,Philippines

Key words: Subduction zone, Stress field, Plate movement, Focal mechanism solution, Taiwan, Philippines