滇西和北京区域重力场演化及其与地震关系的探讨  

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

作　　者：孙少安[1] 项爱民[1] 李辉[1] 

机构地区：[1]中国地震局地震研究所,中国武昌430071

出　　处：《地震》1999年第1期97-106,共10页Earthquake

基　　金：中国地震局"九五"科研攻关项目!95-04-01-06;地震科学联合基金!!197075

摘　　要：在总结、借鉴已有成果的基础上，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。Based on summarization of the previous results and used them for reference, the observational 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 dlstribution 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 regional gravity fields and their relationship with moderately strong earthquakes. The future earthquake trends in the Western 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.

关 键 词：前兆信息 区域重力场 异常指标 地震前兆 

分 类 号：P315.7[天文地球—地震学]