太原4.3级和灵石4.4级地震前后的重力场变化  

Interference in Hydrochemical Observation of Huaqing Hot Spring

作　　者：李清林[1] 张文玉[1] 张瑞敏 

机构地区：[1]国家地震局地球物理勘探中心

出　　处：《山西地震》1997年第3期41-45,共5页Earthquake Research in Shanxi

摘　　要：研究了１９９３年６月２６日和１９９４年４月２６日相继在太原和灵石发生的Ｍｓ４．３和Ｍｓ４．４地震前后的重力场变化。指出，这２次地震前后，晋中南地区重力场均有明显的趋势性异常，并结合该区地壳深浅构造等资料分析，认为今后一个时期，晋中南地区具有发生中强地震的可能。The interference factors and characteristics in hydrochemical observation of Huaqing hot spring have been analyzed and discussed.Through the analysis for the observation date and geohydrologic structure,the conclusion that the factors of precipitation、drain off sewage、water supply had not an effect on the spring,and the perched water when itself does not draw water had a fairly large effect on the observation has been given.The content of O 2 increases,and the N 2 varies little,and the content of CO 2 decreases as the content of He and Rn decreases obviously.It is suggested that the insufficient power supply was the main reason produced perched water.

关 键 词：重力场 地震活动性 深部构造 重力场变化 地震 

分 类 号：P315.5[天文地球—地震学]