Clustering analysis of spatial distribution of seismicity in the Yellow Sea and bohai sea

摘要

According to the records of seismic station networks of China's continent and Korea Peninsula and the historical data, the complete seismicity pattern was obtained for the first time. The seismic zoning was conducted by means of the cluster analysis method. The map's spatial distribution of seismicity from 1960 to 1994 shows that there are three strong seismic zones: the first one strikes in the NE direction, from the Jiangsu plain in China to the central Korean Peninsula; the second strikes in the NW direction, from the Bohai Sea, China to the southern Korean Peninsula; the third strikes in the NE direction, from the western Liaoning Province to Pyongyang.