摘要
中国地震局地震研究所与德国汉诺威大学大地测量研究所于１９９０、１９９２和１９９５年共同在滇西地震预报实验场和昆明进行了３次绝对重力测量。此外，１９９０、１９９２年在北京，１９９０年在武汉也进行了绝对重力测量。通过对各次绝对测量的结果进行比较，并与其它重力仪获得的数据的对比估算了它们的可靠性，进而详细地讨论了各个测点的重力变化。研究发现：在香山、黑龙潭、下关和保山观测到了－０１０μｍｓ－２以上的重力变化，其中前两个点是地下水位变化引起的，后两个点是地震活动引起的。此外，在北京的白家疃和昆明的野毛山不同时间的测量结果差异更大。
Three absolute gravity measurements were performed in WYEPEA and Kunming,in
1990,1992 and 1995,by the Institute of Seismology,CSB,Wuhan,China (ISCSB) and the Institute
Fuer Erdmessung (IFE), University of Hannover,Germany,with additional absolute
measurements in Beijing(1990 and 1992),Wuhan (1990). This paper compares the results of
absolute measurements in the three measurements mentioned above,and evaluates their
reliability by comparisons with gravity data obtained by other gravimeters.Gravity changes on
the individual stations are discussed in detail.The results show that gravity changes more than
-0 10μms -2 were measured at Xiangshan,Heilongtan,Xiaguan and Baoshan.First two of
them were due to the ground water variations and the others were due to the seismic
activity.Larger gravity discrepancies were observed in different times at Baijiatan and
Yemaoshan,but the clear and unambiguous explanation for them could not be given at the
present time.
出处
《中国地震》
CSCD
北大核心
1999年第1期54-64,共11页
Earthquake Research in China
关键词
绝对重力测量
精度
重力时变
地震预报
Absolute Gravimetry\ Accuracy\ Gravity changes with time
