On the basis of processing of 9-scene repeat track Single Look Complex Envisat ASAR data with Small Baseline (SB) method by 2-pass 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 speeded-up is determined from pre-seis-mic to post-seismic. 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 Line-Of-Sight(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.%对2009年4月6日意大利拉李拉6.3级地震9景ENVISAT重轨单视复数据采用双轨模式进行小基线(SB)干涉处理,获得了此次地震的SB-DInSAR时间序列干涉图、位移场以及位移速度场.结果表明:1)地震位移场形变过程为由震前的缓慢变化到震后的加速运动,速度明显由慢到快；2)震中以西为大面积隆起区,最大隆起量为140 mm；震中以东为大面积下沉区域,但形变集中在破裂区,主要在发震过程及震后形成,最大沉降量达185mm;3)地震产生的破裂主要沿震中的东南方向传播,集中在约13.4 km ×7.6 km、方向约135°的椭圆形区域内.
展开▼
