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?????????????????????GPS???????,??????????????Ms8.1??????????????λ???????????????????仯??????????????????????????:1???????????????й??????α??????????,??????????????????????γ????????????????;2?????????????????????粿?γ????????????????????????5.9?????????5.4???????????????????γ??????β??????????;3????????????嶫?????????????巴??,????????Χ???????嶫??????????????????????;4????????????????????????????????Щ??????

SIMULATION AND ANALYSIS OF COSEISMIC DEFORMATION FIELD OF Ms8.1 EARTHQUAKE IN WEST TO KUNLUN MOUNTAIN PASS

The coseismic horizontal displacement field caused by the Kunlun Mountain Ms8.1 earthquake is simulated by use of elastic finite element method and GPS observations,the coseismic apparent strain variation field and the coseismic dislocation of main active faults are calculated.The results show:1)the effect of Kunlun Mountain Ms8.1 earthquake is very obvious on the west strain field of China,and a principal compressive strain area of high value has been formed near the seismogenic fault at the same time;2)the great earthquake made the east of Xinjiang area and the joint part of Xinjiang and Gansu strongly clockwise rotate,it triggered Yumen Ms5.9 and Shihezi Ms5.4 earthquakes,and made Arjin fault display strong differential motion in different segments;3)the earthquake made the movement of almost the northeastern margin of Qinghai-Tibet block,some strain energy was accumulated in Dlha's adjacent area and the east of northeastern margin of Qinghai-Tibet reversally;4)the effect of the great Kunlun Mountain earthquake is big on the joint part of Sichuan and Tibet,where some strain energy was accumulated while earthquake occurred.