包头6.4级地震前银川地磁台的地磁转换函数异常

The anomalism of geomagnetic transfer function of Yinchuan geomagnetic station before Baotou earthquake with mag 6 4 in 1996

分析研究了银川地磁台 1 995～ 1 996年周期从 T=9～ 2 0 0 min的地磁转换函数 A的模|A|,B的模 |B|,帕金森矢量 Cp,倾角 I以及方位角αp的变化 ,结果表明上述参量在 1 996年包头 6.4级地震前存在不同程度的异常 。

By analysing geomagnetic data of Yinchuan geomagnetic station during 1995 and 1996,the variations of moduli ｜A｜ and ｜B｜ of geomagetic transfer function in the period range from 9 to 200 minutes,Parkinson vector C p,angle of inclination I and azimuth angle α p were studied.The results show that the transfer function occurred considerably anomaly before Baotou earthquake with mag 6 4 in 1996.Authors think the anomaly of transfer function can be used to predict earthquake.