摘要
应用地磁场加卸载响应比方法，计算处理了佘山地震台１９８１～１９９７年和崇明地震台１９８３～１９９７年的地磁场垂直分量日变幅资料，研究了１９８０年以来上海邻区发生的３次中强地震前的响应比值Ｐ（Ｚ）的变化特征，找出了该方法适用于上海地区的地震中短期判定指标。
Using the method of geomagnetic field load unload response ratio,the data of geomagnetic vertical component diurnal variation in Seismic Station of Sheshan from 1981 to 1997 and in Seismic Station of Chongming form 1983 to 1997 were processed.The variations of response ratio P(Z) before the occurrence of three moderately strong earthquakes in the neighboring region of Shanghai since 1980 were studied and a decision index suited to judge the medium short term earthquake in Shanghai area was discovered which can guide the seismic regime judgement and improve the comprehensive predicting ability.
出处
《地震地磁观测与研究》
1999年第3期47-51,共5页
Seismological and Geomagnetic Observation and Research
