【摘要】 对2009年4月6日意大利拉奎拉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。更多还原

【Abstract】 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-seismic 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.更多还原