摘要
收集了大同1989年10月M_s5.8地震序列及1991年3月M_s5.8地震序列各15天的地震资料。经计算分别得到135个和149个小震震源机制解。通过系统聚类分析发现,两序列震源机制的类型随时间分布存在一定的差异。分析认为是由第一序列为震群型,第二序列为孤立型的区别所至。详细对比了序列起始2小时和5天的情况,供序列发展趋势的早期判别借鉴。
Source mechanism of 135 and 149 weaker earthquakes are obtained by calculation of the earthquake data for the first 15 days of the two Datond earthquake sequences with Ms 5. 8 ( MS 5. 8 events in October 1989 and in March 1991) . It is found from systematical cluster analysis that there is definite difference between the temporal distribution of the mechanism clusters of the two sequence because the first sequence is the type of earthquake cluster and the second one is the solitary type. The datail comparison of the data of 2 hours and 5 days started from the sequences might provide the basis for the early determination of the earthquake tendency.
出处
《地震》
CSCD
北大核心
1995年第4期345-352,共8页
Earthquake
基金
地震科学联合基金资助课题(91060)
关键词
震源机制
地震序列
震源区
应力场
大同地区
Focal mechanism, Seismic sequency, Datong earthquake, Source stress field
