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地震 ›› 1998, Vol. 18 ›› Issue (S1): 98-102.

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1996年12月16日高丽营地震的磁效应①

赵明1), 林云芳1), 曾小苹1), 续春荣2)   

  1. 1.中国北京 100081 中国地震局地球物理研究所;
    2.中国北京 100085 中国地震局地壳应力研究所
  • 收稿日期:1998-06-03 修回日期:1998-06-19 出版日期:1998-10-20 发布日期:2022-09-30
  • 作者简介:赵明,女,1966年11月出生,副研究员,1991年3月获硕士学位,主要从事地磁学与地震预报等研究工作。
  • 基金资助:
    ①中国地震局“九五”科研攻关项目(96-913-01-01-10); 中国地震局地球物理研究所论著(98A02066).

SEISM O-MAGNETIC EFFECT INDICATED BY THE GAOLIYING EARTHQUAKE OCCURRED ON 16 DECEMBER, 1996 IN BEIJING AREA

Zhao Ming1), Lin Yunfang1), Zeng Xiaoping1), Xu Chunrong2)   

  1. 1) Institute of Geophysics, CSB, Beijing 100081, China;
    2) Institute of Crustal Dynamics, CSB, Beijing 100085, China
  • Received:1998-06-03 Revised:1998-06-19 Online:1998-10-20 Published:2022-09-30

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摘要： 以1996年12月16日发生在北京高丽营的Ms4.0地震为例,运用空间相关对该震中周围地磁台的Z分量空间相关系数Rz随时间变化及空间变化进行研究,发现震前3个月高丽营附近地区的Rz开始下降,表明该地区地磁场的线性关系已被破坏,而这一破坏逐渐增大直至能量释放(地震发生),并于震后迅速恢复正常,表明地磁场的线性关系已恢复。通过对Z分量加权差分后,发现震前异常沿断裂带从震中向远处传播的空间传播方式。

关键词: 震磁效应, 断裂带, 加权差分法

Abstract: In this paper, we studied the Gaoliying earthquake with Ms 4.0 occurred on 16 Decem-ber 1996,Beijing. First, by using the spatial correlation method we analyze the vertical component Z of proton magnetometer records near the epicenter, and have found that the coefficient of correlation Rz goes down 3 months before the earthquake. It shows that the linearity of the local geomagnetic field has been damaged,and the damage became stronger until the energy released (the earthquake occurred), and the anomaly quickly recovered af-ter the event, indicating that linearity of geomagnetic field has been recovered before the earthquake. Meanwhile, by using the weighted difference method we revealed the immi-gration of the anomaly before the earthquake.

Key words: Seismo-magnetic effect, Fracture zone, Weighted difference