Coseismic Deformation Using Synthetic Aperture Radar Interferometry

Since1993Massonnet use the InSAR technology to get Landers earthquakecoseismic deformation, InSAR,as a new geodetic means,has been more and moreused to get coseismic deformation field and slip distribution model.Especially in remote areas of difficult measuring conditions (such as theTibetan Plateau), InSAR show its superiority as high-precision,high-resolution, large-scale deformation information can be obtained andbenefits without ground control points.In this paper, the Japanese JAXA ’s ALOS data was used to study the2008earthquake with Wuqia seismic deformation and fault slip distribution. InWuqia area39.50°N,73.64°E Mw6.7earthquake occurred at October5,2008,we use ROI_PAC software processing4frames Japan ALOS satellite data to obtainthree-dimensional seismic deformation field of Wuqia earthquake. Distance tothe fault north of the maximum displacement of39cm, the maximum displacementof the south side of36cm; azimuth, the north and south of the maximumdisplacement of1.5m and2m respectively. Using Okada elastic dislocationmodel of the earthquake slip distribution analysis, simulation results ofthe strike-slip fault angle of48°, dip-slip angle of53°, a depth of10.5km, the maximum deformation2.5m, the analysis results to the earthquake Norththrusting and sinistral strike-slip.This paper studies the use of ALOS data with the2008earthquake seismicdeformation and fault slip distribution. May12,2008, on the eastern edgeof the Tibetan Plateau Longmen Shan fault occurred Mw7.9earthquake. The authors use the ALOS satellite L-band data,overcoming the region’s undulatingterrain, dense vegetation difficulties InSAR technology to obtain coverageepicenter area adjacent track interference7coseismic deformation. Surfacefault traces extracted using technology to get the azimuth MAI deformationfield, using an elastic half-space dislocation model and the method of leastsquares inversion fault slip distribution model. The inversion results showthat the majority of coseismic slip distribution in the range of more than19km, mainly including Yingxiu, Xiaoyudong Beichuan South Dam four regions.Inversion of moment magnitude of Mw7.9, consistent with the seismologicalresults.In this paper, the use of technology to get Hector Mine earthquakeoffset_tracking distance and azimuth deformation with conventional D-InSARmeasurements together constitute the three-dimensional deformation field.MAI use technology to get to the same azimuth seismic seismic deformation field,extract the rupture trace. MAI techniques and comparing the results of themethods offset_tracking, indicating higher than offset_tracking MAItechnical accuracy of the method, the method relies on the coherence ofimages.