利用D-InSAR和AZO技术获取Bam地震同震三维形变场  

ACQUIRING 3D COSEISMIC DEFORMATION FIELD OF BAM EARTHQUAKE BY USING D-INSAR AND AZO TECHNIQUES

作　　者：季灵运[1,2] 许建东[1] 

机构地区：[1]中国地震局地质研究所,北京100029 [2]中国地震局第二监测中心,西安710054

出　　处：《大地测量与地球动力学》2009年第6期40-44,共5页Journal of Geodesy and Geodynamics

基　　金："十一五"国家科技支撑计划(2006BAC01B040102)

摘　　要：基于升降轨道EnvisatASAR影像,利用两轨法D-InSAR技术获取了2003年12月26日伊朗巴姆Mw6.5地震的同震雷达视线向形变场,同时利用方位向像素偏移技术获取了降轨的同震方位向偏移量,然后计算得到了同震三维形变场。结果表明,发震断层以南北向右旋走滑为主,兼有东西向的块体水平旋转运动。两种作用致使东南象限块体受挤压作用而抬升,东北象限块体则受拉张作用下沉。震中地表没有发生剧烈变形。The coseismic deformation field of the Barn earthquake （ Mw6.5 ）in LOS （line of sight）is obtained with two pass D-InSAR technique based on ascending and descending pass Envisat ASAR images. Meanwhile,the azimuthal displacement is obeained with AZO（ azimuthal pixel offsets）technique. Futhermore ,the coseismic 3D deformation field is resulted from the deformation field in LOS and the azimuthal displacement. The results indicate that the seismogenic fault is a right-lateral strike-slip fault with a little effect of block rotation in eastwest direction. The southeastern quadrant block uplifts under the extrusion stress, and the northeastern quadrant block subsides under the tension stress. There is no dramatic deformation on surface that has a less extent rupture.

关 键 词：巴姆地震 D—InSAR 方位向像素偏移 视线向模糊 三维形变场 

分 类 号：P227[天文地球—大地测量学与测量工程]