DYNAMIC CHANGE OF GRAVITY FIELD IN SOUTH TIANSHAN AREAAND RELATION WITH WESTERN WUQIA Ms6.8 EARTHQUAKE
Liu Daiqin 1,2) ; Li Jie 1,3) ; Wang Xiaoqiang 1) ; Li Hui 2) ; and Paerhati·Zainula 1)
1)Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 8300112)Institute of Seismology,CEA,Wuhan 4300713)Research Center of Space Science and Technology, China University of Geosciences, Wuhan 430074
Abstract：Using the mobilely gravimetric data from 2005 to 2009, the dynamic changes of the gravity field in the South Tianshan Mountain area of Xinjiang is analyzed, and its patterns by year are given. Furthermore,combined with time series of gravity difference value and computed GPS data the intrinsic relations between the gravity and strain fields and the Ms6.8 earthquake on Oct.5,2008 in the west to Wuqia are analyzed.At last,the response of local gravity field to tectonic conditions is analyzed as well. It is shown that the change of gravity field is related to the minidynamic activity of local stressstrain field,i.e. the change of gravity reflects the precusory change feature of the gravity source caused by the strain field change.
Liu Daiqin,Li Jie,Wang Xiaoqiang et al. DYNAMIC CHANGE OF GRAVITY FIELD IN SOUTH TIANSHAN AREAAND RELATION WITH WESTERN WUQIA Ms6.8 EARTHQUAKE[J]. jgg, 2010, 30(Supp.1): 84-88.
