2013年吉林前郭5级震群的前兆异常分析  

Analysis of Precursory Anomaly of Qianguo Earthquake Swarm in 2013

作　　者：张洪艳[1] 卢燕红[1] 康建红[1] 张晨侠[1] 

机构地区：[1]吉林省地震局,吉林长春130117

出　　处：《防灾科技学院学报》2015年第1期32-39,共8页Journal of Institute of Disaster Prevention

基　　金：测震台网青年骨干培养专项(20140307)

摘　　要：2013年吉林前郭发生一次5级震群活动,震群发生前,周边地区前兆出现了若干测项不同时间、不同形态的异常。整理了前郭震群发生前流体、形变、地电学科出现的典型异常,其中丰满水氡、丰满台垂直摆倾斜仪、榆树地电出现破年变、低值下降,异常最早开始于2010年3月;而前郭水温、白城水温、乾安水温出现转折下降,异常多发生在震前一周内,可见此次震群发生前前兆中期异常和临震异常较为突出,中期异常出现时间早,且距震中较远,而临震异常突出且时间较为集中,距震中较近,中期和临震异常的空间演化范围呈现由外围向近场区迁移的现象。An M＆gt;5 earthquake swarm happened in Qianguo of Jilin province in 2013. The precursory anomaly around the epicenter appeared at different time and with different forms. We organized the typical precursory anomaly of fluid, deformation and geo-electric subject before Qianguo earthquake swarm. The water radon and vertical pendulum anomaly in Fengman and geo-electric anomaly in Yushu started in March 2010;anomalies in the water temperature of Qianguo, Baicheng and Qian’ an started one week before the earthquake. The mid-term and impending anomalies are the most outstanding;the mid-term anomaly appeared earlier and far from the epicenter, but the impending anomaly highlight concentrated in a week before the earthquake and close to the epicenter.

关 键 词：前郭震群 前兆异常 异常分析 

分 类 号：P315.72[天文地球—地震学]