摘要
采用传统方法和数字地震学方法(视应力),对首都圈东部地区2009—2017年发生的震群序列性质进行分析,分析结果表明:①使用传统方法不能确定震群序列性质,可以利用视应力方法进一步分析,该方法能够反映每个震群应力场的变化特征,可以进行异常性质判别;②通过2种方法的对比分析,可以提高震群序列异常性质判定结果的科学性和可信度,为后续地震活动趋势提供有力的参考依据。对2种方法进行震例检验,可知后续地震一般为中等以上地震,在震群(具有异常性质)发生1—7个月后发震,发震位置在震源区附近。
The characteristics of earthquake swarm sequences which occurred in Eastern Capital Circle from 2009 to 2017 were studied through traditional method and apparent stress method.The analysis results show that:①When the traditional method is disable to judge precursory properties of earthquake swarm sequences,we can judge the characteristics of the earthquake swam through the variation characteristics of stress fields in each earthquake swam;②By the comparative analysis of two methods,which can improve scientificity and reliability of the judgement of earthquake swarm properties,it will provide more powerful reference for follow-up seismic activity trend.In this paper,two methods are tested by seismic examples and the results show that the follow earthquakes are moderate strong earthquakes when will happen 1-7 months after the occurrence of earthquakes swarm(abnormal characteristics),which most of them occur near the focal region.
作者
岳晓媛
武安绪
冯刚
马梁
Yue Xiaoyuan;Wu Anxu;Feng gang;Ma Liang(Beijing Earthquake Agency,Beijing 100080,China)
出处
《地震地磁观测与研究》
2019年第4期8-15,共8页
Seismological and Geomagnetic Observation and Research
基金
中国地震局监测、预测、科研三结合课题(项目编号:CEA-JC/3JH-170203)
关键词
首都圈东部
震群序列性质
传统方法
视应力
Eastern Capital Circle
characteristics of earthquake swarm sequences
traditional method
apparent stress
