摘要
对2010—2012年川滇西部地区流动重力资料进行统一处理,得到区域重力场变化图象,并以此为基础研究2012年宁蒗-盐源5.7、彝良5.7级地震与区域重力场变化及安宁河-则木河断裂带的关系。结果显示:震区局部重力场在两次地震前均出现了快速、大幅的上升变化,在约一年的时间内增加了约60×10 nms-2的重力变化量。
The changes of regional gravity field have been obtained by the observation data from 2010 to 2012 in the west area of Sichuan and Yunnan which has been unified processed and analysised. Combined the Ninglang- Yanyuan Ms5.7 earthquake and the Yiliang Ms5.7 earthquake which the both recently took place in the Anninghe- Zemuhe fault area,the activities of the Anninghe-Zemuhe fault were researched. The results showe that the gravity changes of the earthquake region increased rapidly and dramatically before the both earthquakes, and the gravity changes increased about 60 × 10 nms^-2 in a year.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第A01期8-10,共3页
Journal of Geodesy and Geodynamics
基金
四川省地震局专项(2200450)
关键词
断裂带
区域重力场
区域应力场
流动重力
地震
fault
regional gravity field
regional stress field
flow gravity
earthquake
