(A) Location and geodynamical setting of the Arabia-Eurasia collision zone. Fault mapping results from the Farbod's PhD thesis work (e.g. Farbod 2011). The arrows show plate velocities (mm yr^-1) after Reilinger (2006) (B) GTOPO30 topographic image on northern part of Central Iran showing the location of the DFS. The arrows show velocities (mm yr^-1) of the DARG and BAJE GPS sites (Tavakoli 2007); the three quadrangles show the footprints of the ENVISAT scenes. GKFS, Great Kavir fault system; DFS, Doruneh fault system; WFZ, western fault zone; CFZ, central fault zone, EFZ, eastern fault zone, DQF, Dahan-Qaleh fault; KF, Khartouran fault. (C) Shaded relief map (SRTM) of the WFZ. The trace of the WFZ joins at DQF and KF at its eastern and western terminations, respectively. The KF absorbs the relative westward motion (left-lateral faulting) of WFZ's northern block by reverse faulting. Left-lateral faulting along the DQF fault implies a prominent reverse component to the left-lateral WFZ.