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处理了鲜水河断裂带上1987年至1995年间的八期高精度重力复测资料,并利用计算机辅助图形分析程序将所有相邻两期的重力变化速率值转换为速率等值线图,通过对资料的逐一分析及与地震对应关系的比较,我们看到,鲜水河断裂带的重力变化与其测区及邻区的地震之间有一定的联系,存在震前重力发生较大异常变化,震后重力立即发生反向直至恢复的变化,并且震前的重力异常变化量与震后重力的反向变化量基本上是一致的。这些典型的例子包括1989年4月14日至5月3日的巴塘6.7级群震,也包括1989年6月9日石棉的5.3级地震,以及1989年9月22日小金的6.6级地震等。
Eight high-precision gravimetric reanalysis data from 1987 to 1995 on the Xianshuihe fault zone were processed and the gravitational change rate values of all the adjacent two phases were converted into rate contour maps by using a computer-assisted graphical analysis program From the analysis of the data one by one and the comparison with the correspondence of the earthquakes, we can see that there is a certain relationship between the gravity change of the Xianshuihe fault zone and the earthquakes in its survey area and its neighboring areas, with large anomalous changes in the gravity before the earthquake, Gravity immediately after the earthquake until the recovery of the reverse change, and the amount of gravity anomalies before the earthquake and the amount of reverse changes in gravity is basically the same. These typical examples include the Badam 6.7 magnitude earthquake from April 14 to May 3, 1989, the 5.3 magnitude earthquake on June 9, 1989, and the small gold on September 22, 1989 The magnitude 6.6 earthquake.