静海地震台地磁短周期变化及其在地震短临预报中的应用

近年来的一些研究表明，由于地震前孕震区地下介质的电性结构的变化，将导致地磁短周期转换函数发生异常变化。通过对地震前后的地磁短周期转换函数的参数的计算、分析和研究，有可能提取出可靠的地震短临前兆异常（曾小苹等，１９９０）。为了进一步开展对该方法研究工作并使其在我区地震预测预报研究中得到应用，我们使用了静海台的地磁记录资料，分析计算了该台地磁短周期转换函数在地震前后的变化情况，确立了该方法应用天津地区地震预报的短临异常特征及指标，取得了较好的效果。

The magnetic variations at Jinghai seismic station and its application in short term and impending earthquake prediction

Research results in recent years have showed that the variations of electric property formation in medium of seismic area should lead the abnormal variations of short period geomagnetic transfer function before earthquakes. Through calculating the parameters of short period geomagnetic transfer function before and after earthquakes and analysing and studying the results, the reliable short term abnormals can be picked up. In this paper, in order to study further this method and apply it in earthquake prediction, the magnetic data recorded at Jinghai County Seismic Station were used and the variations of short period geomagnetic transfer function before and after earthquakes were calculated. The short term and impending abnormal characteristic and index in Tianjin area were obtained and the effect was satisfied.