四川地区4级以上调制小震与5级以上中强地震的关系探讨  

Study on the relationship between modulated earthquakes more than M4.0 and moderate strong earthquakes more than M5 in Sichuan Province

作　　者：李卫平[1] 冯蔚[1] 杨桂岺 

机构地区：[1]中国地震台网中心,北京100045

出　　处：《四川地震》2009年第3期33-37,共5页Earthquake Research in Sichuan

摘　　要：通过对四川地区1972年以来的地震目录进行挑选和分析,得到四川地区4级以上调制小震与5级以上中强地震的对应数据结果。在所发生的41组调制小震中只有14组对应发生了中强地震,这说明在四川地区调制小震与中强地震的对应关系不是太好。但是,调制小震与中强地震的发震地点间的距离对应相关却比较好,平均距离间隔为93.49千米;所对应的调制小震与中强地震的发震时间的时间间隔平均为17.5个月。The seismic events from the seismic catalogue of Sichuan Province since 1972 are selected and analyzed. The statistical corresponding data between earthquakes more than M4. 0 and earthquakes more than MS. 0 are calculated. The statistical corresponding data include 41 groups among which 14 groups are linked to the moderate strong earthquakes. It means that the link between modulated earthquakes more than M4. 0 and moderate strong earthquakes more than MS. 0 in Sichuan Province is weak. But their distance link among earthquakes more than MS. 0 seems to be strong. The average distance between every two earthquakes is 93.94 kilometers and the average interval is 17. 5 months.

关 键 词：4级以上调制小震 5级以上中强地震 四川地区 

分 类 号：P315.71[天文地球—地震学]