Three-Dimensional Surface Displacements and Slip distribution of the 2003 BAM, Iran earthquake Estimated From Combination of Multiple-Aperture and Conventional Interferometry data

By using the ascending and descending Envisat satellite images and also Multiple-Aperture Interferometry (MAI) and Conventional Interferometry techniques, we have calculated the co-seismic deformations on the satellite line of sight and on the azimuth track for the BAM earthquake in 2003. Also the three Orthogonal components of the displacement field from this geodetic measurements were obtained. In order for calculating the fault geometry and the slip distribution on the fault plane then, we inverted the components by using Genetic Optimization Method and also the Analytical Model (Okada Elastic Half-Space). The maximum of the slip was about 2.5 meters along with the 30 K.ms BAM fault on the approximate depth of 4~5 K.ms and by inverting, we have estimated seismic moment (M0), N.m 1018× 7/6 , that indicates a shock on 6.5 Mw scale. By inverting and using the Bootstrap Statistical Method we have also estimated the 68% confidence interval for model parameters.