Data from 65 ERS-1 and ERS-2 interferograms (descending, track 356, frame 2943) covering the Western Salton Trough and spanning a time period from 1992 to 2000 are used to measure surface deformation along the Superstition Hills fault and Elmore Ranch fault. I model the near-fault (within 5 km) deformation along the Superstition Hills fault and Elmore Ranch fault using a 2D analytic model of a vertical strike-slip fault. All the observed signal is assumed to be due to shallow slip. Using data from 12 cross-sectional profiles of interferograms across the Superstition Hills fault, the average slip rate is 7. 7 ± 2.2 mm extending to a depth of 3 .1 ± 2.3 km. The lower bound of the shallow creep appears to increase to the northwest along the Superstition Hills fault from 0.6 km to 7 km.
