1997年广东台山小震群特征

THE GUANGDONG TAISHAN EARTHQUAKE SWARM IN 1997

分析了 1997年 11～ 12月在广东台山市三合镇附近发生的最大震级为 4 1级小震群的活动特征、地质构造背景和震源机制解 ,并将其与 1970年 7～ 12月发生的最大震级为 4 0级的台山震群进行了对比 ,计算了两次小震群的序列特征参数 ,结果表明 。

This paper analysed the seismicity features,geological background and its focal mechanism etc of the earthquake swarm which occurred in Sanhe,Taishan city of Guangdong province with the greatest magnitude 4 1 from Nov.to Dec.in 1997.Compared with another swarm which occurred with M max 4 0 in the same place in 1970, calculated their sequence's seismic parameters,we found the swarm in 1997 has some characteristicsof precursory swarm.