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地震 ›› 1998, Vol. 18 ›› Issue (4): 367-372.

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张北-尚义6.2级地震北京地下水位井网动态异常特征

孙振墩, 孙天林, 简春林   

  1. 中国北京 100036 中国地震局分析预报中心
  • 收稿日期:1998-03-17 修回日期:1998-04-01 发布日期:2022-09-23
  • 作者简介:孙振墩,男,1939年12月出生,高级工程师,主要从事地下流体及地震预报研究工作。

DYNAMIC CHARACTERISTICS OF UNDERGROUND WATER-LEVEL ANOMALIES OF BEIJING WELL NETWORK AROUND ZHANGBEI Ms 6.2 EARTHQUAKE

Sun Zhen'ao, Sun Tianlin, Jian Chunlin   

  1. Center for Analysis and Prediction. CSB, Beijing 100036, China
  • Received:1998-03-17 Revised:1998-04-01 Published:2022-09-23

摘要: 1998年1月10日张北-尚义6.2级地震前,北京地下水位监测网部分井孔观测到一组由趋势到短临前兆异常,并根据这些异常点的分布及不同阶段的异常表现特征和发展过程,进一步分析孕震过程中震源区应力-应变积累与水位动态的内在联系,得出有益的启示,对地震预报前兆研究具有一定的参考意义。

关键词: 地下水位异常, 异常特征, 前兆现象, 张北地震

Abstract: Before the Ms 6.2 earthquake on January 10, 1998, in Zhangbei, Hebei Province, a group of precursory anomalies developed from tendency anomalies to short-term and impending precursors were observed in some wells within Beijing water well network. The distribution of these anomalies and their expression characteristics and development processes during different stages are described in detail in this paper. The results show that the internal relationship between the dynamic water-level features and the accumulative processes of stress and strain during the seismogenic processes in the source region exists, and gives helpful enlightening guidance for seismologists. Therefore, this study has a certain reference value for precursory researches of earthquake prediction.

Key words: Groundwater level anomaly, Anomalous character, Precursor phenomena, Zhangbei earthquake