Observations of a quasi-90-day oscillation in the mesosphere and lower thermosphere(MLT)region from April 2011 to December 2014 are presented in this study.Ther
On May 12,2008,an Mw7.9 earthquake occurred in Wenchuan County,Sichuan Province,China.Movement of Yingxiu–Beichuan Fault in the Longmenshan Fault Zone was cons