CHARACTERISTICS OF SEISMICITY IN YUNNAN PROVINCE
Liu Hanxiong;Zhang Zhiqiang (Seismic Office of the people’s Government of Kunming Cjity,Kunming 650031)
This paper sums up the activities of historical and modern earthquakes in YunnanProvince and suggest that the seismicities in the regbnare characterized by high frequency,large magnitude,shallow source and strong disruption.The strong earthquakes can be dividedinto mainshock and mainshock-aftershock sequences. Since the present century,the activities ofstrong earthquakes tend to migrate in counterclockwise direction. In addition,authors analyzeand discuss prelnninarily the causes of the seismicities,and put forward some earthquakesprediction countermeasures for Yunnan region based on these seismicity characters.