Teleseismic Tomography of Deep Velocity Structure in the Eastern Edge of Tibetan Plateau

The P-wave velocity structure in the eastern edge of Tibetan plateau within the depth range of 300km was obtained by using the FMTOMO seismic tomography software and teleseismic teaveltimes data.Our results show that:(1)From 60 km to 140 km,102°E~104°E,29°N~31°N,there is a relative low velocity region in the southwest of Sichuan basin.(2)In the depth range from 60km to 140 km,the phenomenon of relative high velocity appears along the northwest side of Longmenshan fault.(3)In the depth range from 190 km to 290 km, there is a high velocity phenomenon in the southwest region of eastern edge of Tibetan plateau.The Longmenshan fault and Anninghe fault are not the boundary between high velocity region and low velocity region.