【摘要】 利用转换函数方法对太原基准地震台 1 989年 1月至 1 998年 1 2月的地磁资料进行了计算 ,用所得到的转换函数 A,B的模 |A|,|B|及总方差δZ的月变化 ,来研究地震前后地下电性结构的变化。对 1 989年以来山西及周边地区的 5次 Ms5.0以上地震前后太原基准地震台地磁转换函数的变化进行了研究。得出不同周期的转换函数 A,B以及总方差δZ在震前有明显变化的结论更多还原

【Abstract】 The monthly variations of the modules |A| and |B| of transfer function |A| and |B| and total variance δ z were worked out by using the geomagnetic data of Taiyuan Observatory from Jan. 1989 to Dec.1998, in order to study the variation of electrical property of structure underground before and after earthquakes. The variations of the geomagnetic transfer function of Taiyuan Observatory before and after 5 earthquakes larger than Ms 5.0 ,occurred in Shanxi and its adjacent area since 1989 , were investigated. The result shows that there were obvious changes for the transfer function A , B and total variance δ z with various periods before the occurrence of the earthquakes.更多还原