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地震 ›› 2001, Vol. 21 ›› Issue (2): 75-78.

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张北MS6.2地震前重力异常及异常机制探讨*

张晶1, 孙柏成2   

  1. 1.中国地震局分析预报中心, 北京 100036;
    2.中国地震局综合观测中心,北京 100039
  • 收稿日期:2000-05-16 修回日期:2000-12-04 出版日期:2001-04-30 发布日期:2022-10-27
  • 作者简介:张晶,女,北京市人副研究员主要从事地震分析预报研究。

The gravity anomaly before the Zhangbei earthquake with MS 6.2 and analysis of its mechanism

ZHANG Jing   

  1. Center for Analysis and Prediction, CSB, Beijing 100036, China
  • Received:2000-05-16 Revised:2000-12-04 Online:2001-04-30 Published:2022-10-27

摘要: 根据晋北和辽西地区地质构造背景及力学机制,分析了1998年张北MS6.2地震前后出现在震中外围地区的重力异常变化,对沿深部断裂附近出现的重力异常进行了分析讨论,认为沿深部断裂出现的重力异常可作为地震前兆场的信息。

关键词: 重力异常, 深部断裂, 张北地震

Abstract: The gravity anomaly in the far-field earthquake region before the 1998 Zhang bei MS = 6.2 earthquake is analy zed based on the backg round of geologic st ructure and dynamic mechani sm in no rthern Shanxi province and western Liao ning province. It is discussed that the gravity anomaly occurred along the deep-sea ted fault might beregardedas the seismic precurso rfield.

Key words: Gravity anomaly, Deep-seated fault, Zhangbei earthquake

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