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地震 ›› 1999, Vol. 19 ›› Issue (1): 97-106.

• • 上一篇    

滇西和北京区域重力场演化及其与地震关系的探讨①

孙少安, 项爱民, 李辉   

  1. 中国武昌 430071 中国地震局地震研究所
  • 收稿日期:1998-06-23 修回日期:1998-07-27 出版日期:1999-01-31 发布日期:2022-09-19
  • 作者简介:孙少安,男,1957年10月出生,工程师,主要从事地球重力场变化与地震预报研究工作。
  • 基金资助:
    ①本项工作属中国地震局“九五”科研攻关项目（95-04-01-06）,同时得到地震科学联合基金课题（097075）资助

RESEARCH ON EVOLUTION OF WESTERN YUNNAN AND BEIJING REGIONAL GRAVITY FIELDS AND THEIR RELATIONSHIP WITH EARTHQUAKE

Sun Shao' an, Xiang Aimin, Li Hui   

  1. Wuchang Institute of Seismology, CSB, W uchang 430071, China
  • Received:1998-06-23 Revised:1998-07-27 Online:1999-01-31 Published:2022-09-19

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摘要： 在总结、借鉴己有成果的基础上,采用新的区域重力场相对基准和图示技术,对滇西和北京区域重力网近十年来的观测资料进行了重新计算和分析。通过研究区域重力场空间分布变化与中强地震的关系,提出了适于滇西和北京区域重力网研究重力场空间分布变化的前兆异常指标,并对滇西和北京重力网区及周边地区未来的地震趋势进行了估计。 所得结论可供分析同类区域重力网观测资料参考使用。

关键词: 前兆信息, 区域重力场, 相对基准, 异常指标

Abstract: Based on summarization of the previous results and used them for reference, the ob­servat10nal data from Western Yunnan and Beijing regional gravity networks for nearly ten years are recalculated and re analyzed by using a new relative datum of regional gravity field and a graphic technique. The research on the precursor anomaly indexes of spatial distribution changes of gravity fields suited for the Western Yunnan and Beijing regional gravity networks is presented by means of studying the spatial distribution changes of re gional gravity fields and their relationship with moderately strong earthquakes. The future earthquake trends in the Testern Yunnan and Beijing regional gravity network regions and their neighbouring areas are estimated. The conclusion in this paper can be provided as a reference for analyzing the observational data of the same type of regional gravity net­works.

Key words: Precursor information, Regional gravity field, Relative datum, Anomaly index