摘要
针对北京及其周围地区重复重力测量资料所进行的重力非潮汐信息的处理程式，对该区１９８４－１９８８年期间重力变化机制进行了研究。结果表明，地下水位的变化是１９８４－１９８８年期间北京及其周围地区影响重力重复测量的主要因素。校正后的重力资料显示出，１９８７－１９８８年在北京以西地区重力变化比东部地区的变化幅值大。据分析，这种变化可作为研究１９８９年大同地震的地震孕育场的依据之一。
In this paper, we systematically introduce the method used to deal with the repeatedgravity data in Beijing and adjacent area and analyse the possible cause for the variationof gravity field in this area based on the data obtained during 1984 and 1988. The resultshows that the changes of underground water level in Beijing and its adjacent area arethe main factors which have the effect on the variation of the gravity data' Thechecked data demonstrate that the amplitude of gravity change in western part is largerthan that in eastern part, it may be the possible seismogenic evidence for the DatongYanggao earthquake.
出处
《地震地磁观测与研究》
1994年第5期10-17,共8页
Seismological and Geomagnetic Observation and Research
关键词
重力重复测量
地下水位
孕震
地震
repeated gravitational measurement, effect of underground water level, gravity data processing, seismogenics
