supported by the Director Foundation of the Institute of Seismology, Chinese Earthquake Administration (grant No. IS200916012);Nation Key Technology R&D Program (grant No. 2008BAC35B02);National High Technology Research and Development Program of China (grant No. 2007AA12Z169)
supported by the 863 project of China(2007AA12Z169)
GPS and the COD VTEC data were studied in search of ionospheric VTEC changes in space and time that might be associated with the Wenchuan Ms8.0 earthquake on 12 May,2008. The result shows several significant anomalous...