云南彝良“9·7地震”前的异常及特点  

The Characteristics of Precursor Anomaly for Earthquake in YiLiang on September 7

作　　者：孙宗强 师娅芳 卢双苓 赖爱京 余晓红 朱荣欢 王斌 高华宴 

机构地区：[1]水富县防震减灾局,云南水富657800 [2]贵阳基准地震台,贵州贵阳550018 [3]泰安基准地震台,山东泰安271000 [4]新疆阿克苏中心地震台,新疆阿克苏843000 [5]大姚县地震局,云南大姚675400 [6]昆明市防震减灾局,云南昆明650500 [7]江苏省盐城地震台,江苏盐城224005 [8]禄丰县地震局,云南禄丰651200

出　　处：《华南地震》2013年第4期77-86,共10页South China Journal of Seismology

摘　　要：通过对2012年9月7日云南省昭通市彝良县洛泽河一带5.7、5.6级地震前地震活动和前兆异常及地震活动特征、流体和形变动态变化和预测指标分析发现:地震前4级地震活动水平增强、出现小震活动空区;前兆异常开始于震前1年左右;短期异常有由外围向震中迁移的现象;临震异常出现的时间较为集中,在震前一周内。对该地区5.0级以上强震的预报和研究具有一定的指示意义。The paper analyzed the seismic activity, the precursor anomaly, the characteristics of the seismic activity, the dynamic changes of underground for the earthquake in YiLiang on September 7, 2012. The results show that： Before the earthquake, there appeared the increasing of magnitude 4 earthquakes activity level and small earthquake activity area; The precursory anomalies began about 1 year ago; There existed the migration phenomenon from the periphery to the epicenter of of short-term anomaly; The appearance time of impending anomaly was relatively concentrated in a week before the earthquake. There is some guiding significance for earthquakes （Mr〉5） analysis and larecursor.

关 键 词：彝良地震 地震活动异常 前兆异常 

分 类 号：P315.75[天文地球—地震学]