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地震

地震 ›› 1998, Vol. 18 ›› Issue (3): 293-298.

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唐山地震的重力异常及其震后变化①

张晶1), 孙柏成2), 张成强2)   

  1. 1)中国北京100036中国地震局分析预报中心;
    2)中国北京100039中国地震局综合观测中心
  • 收稿日期:1997-12-05 修回日期:1998-02-24 出版日期:1998-07-31 发布日期:2022-09-08
  • 作者简介:张晶,女, 1963年5月出生,副研究员,主要从事重力资料分析及地震预报研究工作。

GRAVITY ANOMALY BEFORE TANGSHAN EARTHQUAKE AND GRAVITY CHANGES AFTER THE EARTHQUAKE

Zhang Jing1), Sun Baicheng2), Zhang Chengqiang2)   

  1. 1)Center for Analysis and Prediction, CSB, Beijing 100036, China;
    2)Comprehensive Surveying Brigade, CSB, Beijing 100039, China
  • Received:1997-12-05 Revised:1998-02-24 Online:1998-07-31 Published:2022-09-08

PDF (PC)

102

摘要： 将唐山地区1981~1997年流动重力资料进行整理,分析唐山地震前后重力变化的全过程。震后二十余年,唐山地区未出现过震前量级的重力异常,且在震后10年里重力值逐渐恢复至正常水平。研究表明,唐山地震前的异常变化是确实存在的, 1995年10月古冶ML5.4地震前亦出现了形态相似的重力变化。

关键词: 唐山地震, 重力, 异常

Abstract: The data of mobile gravity measurement in Tangshan region are processed from 1981 to 1997. Analyzing gravity changes before and after Tangshan earthquake, it indicates that no similar gravity anomaly appeared in Tangshan region 20 years after the earthquake, and the gravity value has gradually return to the normal level within 10 years after the earthquake. The result shows that there was the gravity anomaly certainly existed before Tangshan earthquake and there was similar gravity change before the Guye earthquake with ML 5.4, 1995, in this area.

Key words: Tangshan earthquake, Gravity, Anomaly