地震电磁辐射前兆异常特征和异常指标关系研究  

Study on Characteristics and Index Relation of Electromagnetic Precursory Anomaly of Earthquakes

作　　者：李美[1] 卢军[1] 

机构地区：[1]中国地震台网中心,北京100045

出　　处：《地震》2008年第4期112-120,共9页Earthquake

基　　金：国家科技支撑计划(2006BAC01B02-04-01);台网中心青年基金(208-1504)

摘　　要：根据收集的地震电磁类资料,总结分析了地震电磁异常特征及震例的异常指标间的关系。据统计,一般对M≥3.0地震,电磁异常平均出现在震前10-45天,异常的平均传播距离为100-600 km,震级越大,异常提前出现的时间越早,异常传播的距离越大;一定范围内,震级和异常提前出现的时间、震级和异常传播的距离存在简单的线性关系。地震发生在异常出现后两个月之内的概率达93.5%。有88%的地震发生在异常结束后或异常结束当天,有98%的地震发生在异常结束后20天以内。According to the data collected,characteristics and index relation of electromagnetic precursory anomaly of earthquakes are analyzed.By Statistics,in general,for M≥ 3.0 earthquakes,the average time of the anomaly appearing beforehand is from ten to forty-five days.And the average distance of the anomaly transition is from 100 to 600km.The bigger the earthquake magnitude is,the earlier the anomaly appears and the longer the anomaly transmits.The probability of earthquake occurrence within two months after the anomaly appears is 93.5%.The probability of the earthquake occurrence the day or after the anomaly is over is 88% and 98% for earthquakes occurrence within 20 days after the anomaly is over.

关 键 词：地震电磁观测 异常特征 异常指标关系 

分 类 号：P315.7[天文地球—地震学]