摘要
Temporal-spatial evolution of gravity field before the Wenchun MS8. 0 earthquake was analyzed systematically by integrally adjusting the gravity observation data from the northeastern edge of the Tibetan Plateau. The results show that deep material of Tibetan Plateau moved northeastward after Wenchun MS8.0 earthquake, and some channels were blocked by the Ordos Block. Regional gravity field changed significantly on a large spatial scale. After the Wenchun earthquake, gravity field changed non-uniformly between Liupanshan fault zone which borders land of Gan-Ning-Shan and the fault zone along the north edge of west Qinling Mountains. This area was affected by the Wenchun earthquake significantly.