【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。更多还原

【Abstract】 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.更多还原