震磁前兆研究  

SEISMOMAGNETIC PRECURSOR RESEARCH

作　　者：詹志佳[1] 高金田[1] 张洪利[1] 赵从利[1] 郭启华[1] 张玉敏[1] 沈文志[1] 

机构地区：[1]国家地震局地球物理研究所

出　　处：《地震研究》1996年第4期340-345,共6页Journal of Seismological Research

摘　　要：本文根据我国２０多个地震的观测结果，统计分析了震磁前兆的时空特征以及与地震的相关性。研究表明，震磁前兆有着一定的空间分布，存在离震中较近其幅度较大的趋势。震磁前兆可分为长期、中期、短期三类。平均而言，地震越大，相应的震磁变化幅度、空间展布范围、前兆时间均有增大的趋势。作为应用地磁方法进行地震预测研究的一个实例，本文还描述了北京地区的震磁观测以及对宝抵地震（Ｍ＝４．５，１９９３年１１月１８日）的预测情况，表明应用地磁方法进行地震预测研究具有良好前景。Space - time characteristics of seismomagnetic precursors and their relationship with earth quakes are statistically analysed from the obserational data of more than 20 earthguakes in China．Study indicates that there is a certain space distribution for seismomagnetic precuresors, and there exists a tendency that the shorter the epicentral distances, the bigger the anomaly amplitudes. The seismomagnetic precursors can be divided into three kinds of long, medium and short terms. Generally speaking there is a tendency that seismomagnetic variation amplitudes，ranges in space and precursory times increase with earthquake magnitude. As a practical example in earthquake prediction study by geomagnetic method, seismomagnetic observation around Beijing and prediction for Baodi earthquake with M=4．5 on Nov. 18， 1993 are also described in this paper. It shows a good prospect in earthquake prediction study by geomagnetic method.

关 键 词：地震预报 地磁异常 地震 

分 类 号：P315.7[天文地球—地震学]