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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。
Some researches in recent years show that due to the change of the electrical structure of the subterranean media in the seismogenic zone before the earthquake, the short-period geomagnetic conversion function will be abnormally changed. By calculating, analyzing and studying the parameters of the geomagnetic short-period transfer function before and after the earthquake, it is possible to extract reliable short-term anomalous precursory anomalies (Zeng et al., 1990). In order to further carry out the research on this method and make it apply to the study of earthquake prediction and prediction in our region, we used the data of geomagnetic records from Jinghai Station, and analyzed the changes of the short-period geomagnetic transfer function before and after the earthquake This method applied the short-term anomaly characteristics and indexes of earthquake prediction in Tianjin area and achieved good results.