Abstract We used Wuhan, one of IGS stations, as a reference to form ultra long baseline and solve instantaneous 1HzGPS positions and measure the coseismic kinematic deformations caused by Wenchuan earthquake. Compared with the results from using Yaan as the reference which is nearby 1HzGPS stations, the deformation solutions show good consistence with different reference stations. The maximum deformation amplitude is found for station Pixian, which had the largest deformation about 1.034 meter. The deformations of stations,such as Pixian, Chengdu, Mianyang, Zhongjiang are relatively larger and also show the propagation direction of seismic waves. The smaller deformations occurred in Qionglai, Yaan, in the south of the epicenter, which indicate that the fault ruptured from the epicenter to the northeast. On the basis of the arrival time of seismic wave recorded in kinematic time series and the distance between 1HzGPS stations and the epicenter, the estimated average velocity of seismic wave in the crust is 3.1 km/s.
Liu Gang,Tan Kai,Peng Maolei et al. USING ULTRA LONG BASELINE TO MEASURE CO-SEISMIC KINEMATIC DEFORMATIONS OF WENCHUAN EARTHQUAKE[J]. , 2011, 31(5): 14-19.
Liu Gang,Tan Kai,Peng Maolei et al. USING ULTRA LONG BASELINE TO MEASURE CO-SEISMIC KINEMATIC DEFORMATIONS OF WENCHUAN EARTHQUAKE[J]. jgg, 2011, 31(5): 14-19.
