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Abstract

Iran Plateau is located in a convergent zone, between Arabian and Eurasia plates, so that, tectonically it is an active area. Occurrence of permanent and damaging earthquakes prove this activity. Disastrous Bam earthquake of moment magnitude (Mw) 6.6 occurred on December 26.2003 and caused widespread damages. At first it was suggested that the rupturing of Bam active fault (striking north – northwest) caused this earthquake, but later studies showed that this earthquake is the result of a concealed fault activity that striking under the town of Bam and parallel to the Bam active fault. This fault is known as a branch of Bam fault. In this study in addition to reviewing the application of remote sensing, especially thermal remote sensing in seismic studies, the relationship between near surface geological formations and amplification of shaking during the earthquake, the geomorphologic evidences of tectonic activity in the bam area, and geomorphology and geometry of bam active fault is studied. This study shows that a 15 – 20 m high fault scarp, deflected steams, deep gullies and mass movements altogether are the result of tectonic processes in the area. Regarding these evidences, the active faults in the area may cause other earthquakes in the future.

Keywords: Earthquake, Active fault, Bam fault, Gully erosion, Tectonic, Structural geomorphology

Keywords