中强地震前地电阻率异常变化的研究

Research on Anomalous Variation of Ground Resistivity before Medium Strong Earthquakes

研究了华北地区中强地震前地电阻率异常变化的基本特征，对已发生的中强以上地震前的部分地电异常变化及其与地震３要素的关系再次进行了总结和研究，指出地电阻率异常变化可能对判断地震趋势及对华北地区的短临预报跟踪有参考意义。

The basic characteristics of anomalous variation of ground resistivity before medium strong earthquakes in North China have been studied,the relationship between the anomalous variation of ground resistivity and the 3 factors of earthquake before the previous medium strong earthquakes has been summarized and stu died ,it is suggested that the anomaly of ground resistivity may be valuable for the follow up of short impen ding prediction in North China.