The arc area on the northeastern side of the Qinghai-Tibet plateau is characterized by newest and intensive uplift and outward expanding of the plateau, with very active neo-tectonic movements and strong earthquakes in the China's mainland. In the last 20 years, geologists have done a lot of studies in this area, concerning with active faults, palaeoearthquakes, tectonic deformation and process in Quaternary, the scales and rates of active fault displacement, and interaction of various tectonic blocks on th...