Abstract：On the basis of processing of 9scene repeat track Single Look Complex Envisat ASAR data with Small Baseline (SB) method by 2pass mode, a time series difference interferograms and deformation field and its velocity of L′Aquila Mw6.3 earthquake occurred on April 6, 2009 were obtained. The results show as follows. 1) There was an obvious process of displacement and its velocity from slow to speededup is determined from preseismic to postseismic. 2) In the analyzed area of about 54 km×59 km, westward of epicenter shows uplift, and its maximum uplift value is 140mm in the LineOfSight(LOS) and the east to epicenter is subsidence area. However, the head subsidence region is a rupture area, and its majority formed in the course of shocking and subsequence. The maximum settlement reaches to 185 mm. 3)The rupture propagates mainly southeastwards, about 135°, from epicenter, and concentrates on an elliptic area of about 13.4 km×7.6 km.
