华北地区地电阻率归一化速率异常分析  

Anomalies of normalized rate of geoelectric resistivity in North China

作　　者：李姜[1] 乔子云[1] 张国苓[1] 贾立峰[1] 罗娜[1] Li Jiang;Qiao Ziyun;Zhang Guoling;Jia Lifeng;Luo Na(Hebei Earthquake Agency,Shijiazhuang 050021,China)

机构地区：[1]河北省地震局

出　　处：《地震地磁观测与研究》2019年第6期62-71,共10页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局地震科技星火计划(项目编号：XH17004Y);中国地震局震情跟踪定向工作任务青年课题(项目编号：2018010409)

摘　　要：应用归一化变化速率方法,处理华北地区地电阻率观测数据,分析异常空间展布特征及震前异常指标,结果表明:使用归一化变化速率方法进行数据处理,可较好地反映华北地区地电阻率的速率变化;地震发生前,地电阻率归一化变化速率多以小于-2.4的异常变化特征为主,与华北成组地震活动中地电阻率大多出现加速下降变化的破年变异常相符。The normalized rate method is used to process the geoglectric resistivity observation data in North China,and the spatial distribution characteristics of anomalies and the anomaly index before earthquakes are summarized.The results show that the normalized rate method can well reflect the rate change of the geoglectric resistivity,and the anomalous variation characteristics are mainly less than -2.4 before the earthquake,which is consistent with the breaking-year anomalies of the accelerated decline of the geoglectric resistivity in most of the group seismicity in North China.

关 键 词：地电阻率 华北 归一化变化速率 

分 类 号：P315.722[天文地球—地震学]