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Summary of Proposal GEO3449

TitleDetermination of three-dimensionalpostseismic deformations and crustal strain tensors with TerraSAR-X data
Investigator Gan, Jie - School of Geosciences and Info-Physics,Central South University, Department of Geomatics
Team Member
Dr. Gan, Jie - School of Geosciences and Info-Physics,Central South University, Department of Geomatics
Professor Hu , Jun - School of Geosciences and Info-Physics,Central South University, Department of Geomatics
Mr Yang , Changjiang - School of Geosciences and Info-Physics,Central South University, Department of Geomatics
SummaryTectonicmotion is one of the most serious threatens to human. Many tremendous seismicevents, including the Mw 8.0 Wenchuan earthquake in 2008, have causedimponderable economic losses and casualties. Compared to other geodetictechnologies such as leveling and GPS, InSAR has the advantageous wide spatial coverage,all-day and all-weather. However, only the one-dimensional displacement (1D) inLine-Of-Sight (LOS) direction monitored by InSAR can be obtained well tointerpret the actual postseismic surface deformations (Wright et al., 2003). Thisproject will serve to (1) estimate three-dimensional (3D) postseismic surfacedeformations in the Sichuan-Yunnan region from the InSARdata, (2) resolve crustal strain tensors from the InSAR derivedthree-dimensional postseismic deformations and (3)Assessing the seismic riskfor the investigated faults from the joint analysis of 3D postseismic surfacedeformations and strain rate field. The observations from DInSAR, MAI andOffset-tracking will be integrated to extend 1D LOS measurements to 3D, andimprove the accuracies of 3D deformation measurements, particularly theNorth-South vectors. Besides, the multi-track and multi-temporal observationswould also be combined to improve the temporal resolution of the 3D postseismicsurface deformations measurements. The approaches of Least-Squares Collocation (LSC)algorithm is introduced in our study, which is crucial in better integration ofthe above mentioned observations. Thedeliverables of this project may include several peer-reviewer journal papers,several presentations in the international conference, and some algorithms onthe integrated 3D postseismic surface deformations and strain rate field forassessing the seismic risk for the investigated faults in the studyregions. The study is mainly funded by: (1) the National Key BasicResearch and Development Program of China under Grant 2013CB733303, (2) theNational Natural Science Foundation of China under Grant 41404011, 41304011,41374013 and 41222027, and (3) the Project of Innovation-driven Plan of CentralSouth University under Grant 2016CX004.

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