摘要
利用转换函数的方法对临汾台1988年1月至1998年12月地磁资料进行了计算处理,用所得到的转换函数A、B的模A、B及总方差zd的月变化,来考察地震前后地下电性结构的变化。对1988年以来发生在临汾台及周边地区的3次Ms4.0以上地震前后临汾台地磁转换函数的变化情况进行了研究。结果表明:不同周期的转换函数A、B以及总方差zd在震前有明显变化。
Based on the geomagnetic data of Linfen station from Jan. 1998 to Dec. 1998, the monthly variation of the modules A and B of transfer function A and B and total variance zd were worked out by using transfer characteristic method, in order to study variation of electrical property of structure underground before and after eartyquake. The variation of the geomagnetic transfer function of Linfen station before and after 3 earthquake larger than Ms4.0, occurred in Linfen station and its adjacent area since 1988, were investigated. The result shows that there were obvious changes for the transfer function A, B and total variance zd with various period before the occurrence of the earthquakes.
出处
《地震地磁观测与研究》
2002年第3期46-52,共7页
Seismological and Geomagnetic Observation and Research
关键词
临汾市
地磁
转换函数
地震前兆
Linfen,geomagnetic,transfer function,earthquake
