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地震 ›› 1998, Vol. 18 ›› Issue (S1): 71-76.

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北京地区地磁变化与震磁前兆研究①

詹志佳, 赵从利, 张洪利, 高金田, 沈文志   

  1. 中国北京 100081 中国地震局地球物理研究所
  • 收稿日期:1998-06-03 出版日期:1998-10-20 发布日期:2022-09-30
  • 作者简介:詹志佳,男,1941年12月出生,研究员,主要从事地磁学、构造磁学与震磁前兆研究工作。
  • 基金资助:
    ①中国地震局地球物理研究所论著(98A02047)

STUDY ON GEOMAGNETIC CHANGE AND SEISMOMAGNETIC PRECURSOR IN BEIJING AREA

Zhan Zhijia, Zhao Congli, Zhang Hongli, Gao Jintian, Shen Wenzhi   

  1. Institute of Geophysics, CSB, Beiing 100081, China
  • Received:1998-06-03 Online:1998-10-20 Published:2022-09-30

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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125 nT.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ML 4.5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。

关键词: 地磁变化, 前兆信息, 地震预测, 北京地区

Abstract: The analytical results of geomagnetic data in Beijing area during 1986~ 1994 show that the variations of total geomagnetic intensity appear increasing tendency during this period, and the increasing amplitude is about 125 nT. The geomagnetic changes and their frequency spectra at various temporary stations show a good consistency. Under the back-ground of geomagnetic normal changes, the seismomagnetic precursor information has been studied. The seismomagnetic precursor information is obtained from several earth-quakes occurred in Beijing and its surrounding area. On the basis of the anomalous infor-mation 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 ac-tive effect and good prospect in earthquake prediction study. However, it is still in the stage for data accumulation and test. It is necessary to strengthen the observation and re-search in the future.

Key words: Geomagnetic change, Precursor information, Earthquake prediction, Beijing area