摘要
1986～1994年北京地区地磁资料的分析结果显示，此期间的地磁总强度变化呈上升趋势，其上升幅度约为125nT。各临时台的地磁变化及其频谱有着良好的一致性。在地磁正常变化的背景下研究了震磁前兆信息，获得了发生在北京及其附近地区几个地震的震磁前兆信息。根据地磁前兆异常信息，较好地预报了1993年11月18日ML4．5宝坻地震。观测研究结果表明，地磁方法在地震预测研究中具有积极作用与良好前景，但目前尚处于积累资料与试验阶段，今后须要加强观测研究。
The analytical results of geomagnetic data in Beijing area during 1986～1994 showthat the variations of total geomagnetic intensity appear increasing tendency during thisperiod, and the increasing amplitude is about 125 nT. The geomagnetic changes and theirfrequency spectra at various temporary stations show a good consistency. Under the background of geomagnetic normal changes, the seismomagnetic precursor information hasbeen studied. The seismomagnetic precursor information is obtained from several earthquakes occurred in Beijing and its surrounding area. On the basis of the anomalous information of geomagnetic precursor, the Baodi earthquake with ML 4. 5 on November 18,1993 is well predicted. The investigation results show that the geomagnetic method has active effect and good prospect in earthquake prediction study. However, it is still in thestage for data accumulation and test. It is necessary to strengthen the observation and research in the future.
出处
《地震》
CSCD
北大核心
1998年第S1期71-76,共6页
Earthquake
关键词
地磁变化
前兆信息
地震预测
北京地区
Geomagnetic change, Precursor information, Earthquake prediction,Beijing area
