Main Factors Affecting the Distribution of the Macroscopic Destruction Field of Earthquake

Main Factors Affecting the Distribution of the Macroscopic Destruction Field of Earthquake

Li Minfeng;Li Shengqiang;Chen Yong;Mi Hongliang

【期刊名称】《中国地震研究（英文版）》 【年(卷),期】2001(015)002

【摘要】It is proposed that some possible macroseismic epicenters can be determined quickly from the relationship that the microseismic epicenters located by instruments bear with faults. Based on these so-called macroseismic epicenters, we can make fast seismic hazard estimation after a shock by use of the empirical distribution model of seismic intensity. In comparison with the method that uses the microseismic epicenters directly, this approach can increase the precision of fast seismic hazard estimation. Statistical analysis of 133 main earthquakes in China was made. The result shows that the deviation

distance

between

the

microseismic

epicenter

and

macroseismic epicenter falls within the range of 35 km for 88 % earthquakes of the total and within the range of 35 to 75 km for the remaining ones. Then, we can take the area that has the microseismic epicenter as its center and is 35 km in radius as the area for emphatic analysis, and take the area within 75 km around the microseismic epicenter as the area for general analysis. The relation between the 66 earthquake cases on the N-S Seismic Belt in China and the spatial