This paper analysed the data of repeated gravity measurements in 1976 Longling earthquake area.The result shows that before several strong aftershocks occurred in the earthquake area,the variation of gravity measurement appeared obvious process of increasing and then decreasing,and after aftershocks,the gravity value recovers.Finally,the features of the gravity variation are also discussed.
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李天生,范文.龙陵震区的重力变化与强余震活动[J].地震工程学报,1991,13(4):49-53. Li Tiansheng, Fan Wen. GRAVITY VARIATIONS IN THE LONGLING EARTHQUAKE AREA AND STRONG AFTERSHOCK ACTIVITY[J]. China Earthquake Engineering Journal,1991,13(4):49-53.