Abstract：The repeatedly gravimetric data in western area of Yunnan Province are analyzed. The dynamic evolution characteristics of gravity field in the seismogenic process of the Panzhihua Ms6.1 earthquake on Aug. 30,2008 in Sichuan Province and Yaoan Ms6.0 on Jul. 9,2009 in Yunnan Province are studied and the following conclusions are drawn. 1)The gravity observations reflected the precursory gravity information during the seismogenic process, the dynamic evolution pattern of gravity reflects clearly the gravity field’s evolution of “quasihomogeneous→heterogeneous then earthquake→quasihomogeneous” in the process of the Pabzhihua Ms6.1 and Yaoan Ms6.0 earthquakes.2)The tendency after Panzhihua Ms6.1 earthquake are estimated and the annual prediction before Yaoan Ms6.0 earthquake are made.
Zhu Yiqing,Guo Shusong ,and Liu Fang . VARIATION OF GRAVITY FIELD BEFORE AND AFTERPANZHIHUA Ms6.1 AND YAOAN Ms6.0 EARTHQUAKES[J]. jgg, 2010, 30(4): 8-11.
