We modeled the effect of the deformation of a Density Gradient Zone(DGZ)on a local gravity field using a cubical model and introduced a new method to simulate a
A M6.6 earthquake occurred on July 22,2013 at Dingxi Basin in Gansu Province within the tectonially expanding northeastern margin of the Qinghai-Tibet Plateau.W
Variations of Vertical Total Electron Content(VTEC)in the ionosphere are investigated around the time of the Ms7.0 Lushan earthquake.A time-series analysis show