ON THE INTENSIVE SEISMIC ACTIVITY IN CHINA AND ITS RELATION TO PLATE TECTONICS
SHI ZHEN-LIANG, HUAN WEN-LIN, WU HUANG-RINGAND CAO XIN-LING (Institute of Geophysics, Academia Sinica)
In this paper, the authors try to apply the new theory of plate tectonics to explain the regional characteristics of seismicity in China. By using time, spatial and intensive distribution of earthquakes in and near China, in combination with corresponding variation of crustal tllickness, and according to the seismic activity within our territory, four regions have been devided. The seismic characteristics of each region were further analysed by seeking the pattern of orientation of compression stress axis, according to the fault plane solutions of the regional earthquake mechanism. The authors come to a preliminary conclusion that the activities of strong earthquakes in each region are effected by Pacific tectono-plate movement from the East by the Indian tectono-plate movement from the South-West. Of course the detail will be provided by the further study.