Preliminary study on the influence of earthquake to crustal horizontal movement of northeastern margin of Qinghai-Tibet block
YU Zhi-zhong①, FENG Li-li②, LI Tian-wen②, LIANG Wei-feng③,WANG Qing-liang③,CUI Du-xin③(①Department of Surveying and Mapping of Geology and Mineral Resources,Changchun 130062, China; ②Department of Urban and Resources Science, Northwest University, Xi’an 710069, China; ③Second Crust Monitoring and Application Center, CEA, Xi’an 710054, China)
The 14 November, 2001, Ms 8.1 west Kunlun earthquake is the largest event that has occurred in the Tibetan Plateau since 1951. In order to examine the influence of the earthquake on the crustal motion, taking Kunlun Ms 8.1 earthquake as an example, using GPS data measured after Kunlun Ms 8.1earthquake as data source, and using Okada dislocation model as principle, the authors compute the coseismic horizontal displacement field. They also analyze the effect on local crustal horizontal motion. The results indicate that the GPS spots which plumb the fault along epicenter direction are more affected, while the influences of fault dislocation to the co-meismic displacement of the spots is less.