高精度绝对重力测量对地震活动监测具有重要意义，从重力数据精度与地震三要素的时空关系出发，定量分析数次大地震发生时震源、震级与重力变化值的相关关系。结合不同精度重力资料的研究成果，总结原始重力数据可用的研究方向。结果表明，目前国内大部分绝对重力仪能提供时间跨度一年以上、MS>6.0远震或MS<6.0地方震的重力资料，及地下构造研究的长期缓慢重力场变化数据等。但对于一年以内MS>6.0近震观测及临震监测和板块运动监测，系统偏差和精度要求较高，需要依赖FG-5等进口仪器提供原始数据。%High precision absolute gravity measurements are of great significance for earthquake monitoring. In this paper, the application of absolute gravimeter in gravity monitoring is introduced fi rst. Then starting from the co-seismic effects and the precision of gravity data,by collecting and sorting relative papers on co-seismic gravity,analysis is made on the relationships between epicenter, magnitude and gravity change. Besides,the signifi cant research directions is concluded considering the precision of the original gravity data with research results considering gravity data of different precision. It turns out that the precision of most civil absolute gravimeters can provide valuable data on co-seismic effects with a time span within a year,MS> 6.0 earthquakes orMS< 6.0 local earthquakes, together with long time gravity slow change for research on subsurface structure. With conditions requiring a precision below 10μGal, like near-by earthquakes′ co-seismic change within a year withMS> 6.0, together with data for calculating the plate movement, reliably monitoring these two important indexes still depends on imported instruments like FG-5.
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