HR: 0830h
AN: G21D-0291    [PDF]
TI: Study of Co-Seismic Ground Deformation due to Two Earthquakes in India Using the Technique of SAR Interferometry
AU: * SripatiI, S P
EM: spmrao@hd1.vsnl.net .in
AF: NATIONAL GEOPHYSICAL RESEARCH INSTITUTE, UPPAL ROAD, HYDERABAD, 500 007
AB: The technique of SAR Interferometry has been used to study co-seismic ground deformation due to the Chamoli earthquake of 28th March 1999 and the Latur earthquake of 29th September 1993. For the Latur area, 11 ERS-1/2 SAR images were acquired and several pairs of co-seismic interferograms have been analyzed. The advantage here has been the relatively less rugged terrain while the fact that this is an agricultural land is the main hurdle in establishing the observed deformation signal as being due to the earthquake. At least two independent interferograms show possible deformation due the earthquake. For the Chamoli earthquake area, 10 ERS-1/2 SAR images were used to form co-seismic and topographic interferograms. One co-seismic interferogram has revealed possible deformation fringes due to the earthquake. The main hurdle for this area is the rugged mountainous terrain and possible strong atmospheric artifacts. ALthough the interferograms were noisy and only partial fringe patterns were obtained, an attempt has been made to use elastic dislocation modeling to obtain the best fit to the observed deformation. The results of these analyses and constraints on the earthquake parameters will be presented.
DE: 1242 Seismic deformations (7205)
DE: 1734 Seismology
DE: 7205 Continental crust (1242)
SC: Geodesy [G]
MN: 2003 Fall Meeting