1) Institute of Seismology, CEA, Wuhan 430071 2) Crustal Movement Laboratory, Wuhan 4300713) School of Geodesy and Geomatics,Wuhan University,Wuhan 430079
Abstract：Using vertical total electron content(VTEC) derived from the reference stations of Crustal Movement Observational Network of China to examine the ionospheric variations during the Ms7.1 Yushu earthquake occurred on April 14,2010,in China, the time series of TEC values over 4 GNSS stations(LHAS,LUZH,DLHA,WUSH) around the epicenter and the TEC values of 2D distribution over whole China was computed.The final results show that the ionospheric VTEC over 3 GNSS ststions(LHAS,LUZH,WUSH) increased in the afternoon of local time on April 1,and the VTEC values over 3 GNSS stations(LHAS,LUZH,DLHA) also increased in the midnight on April 5, both of these ionospheric anomalies drifted from east to west,and the latter acrossed the whole China.
