By analyzing the gravity change in the northern Qilian~Hexi region,it is considered that the gravity change drops from slow to quick and forms a high gradient zone.The wide-ranging crustal deformation and cross-fault deformation have turned quick rise into slow drop,it has got into middle preparation period of strong earthquake.Therefore,it is carefully monitored.
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祝意青.北祁连~河西地区重力变化特征分析[J].地震工程学报,1997,19(1):22-26. ZHU Yiqing. ANALYSIS ON THE GRAVITY CHANGE CHARACTER IN THE NORTHERN QILIAN~HEXI REGION[J]. China Earthquake Engineering Journal,1997,19(1):22-26.