Ahmad Rashidi - Assistant Professor, Department of Seismotectonics,IIEES , Tehran, Iran
Hossein Kianimehr - Iranian Seismotectonics Center, Institute of Geopjysics, University of Tehran, Iran

The western and southwestern margins of the Lut Block in SE of Iran have experienced many historical and instrumental destructive earthquakes in which with 11 destructive earthquakes from 1977 to 2012, with about 195km surface rupturing in this area. In this study, we used different data sources by merging DEM terrain interpretation and satellite images (acquired from Quickbird, Aster and landsat and viewed in Google Earth) analysis with geomorphological surveys. We introduced a number of faults for the first time and also we investigated activity evidences for a group of the previous known faults. Our results have general applications in describing en-echelon faults, development of releasing and restraining bends and also in fault growth studies. According to earthquake distributions, we found that Nayband is almost aseismic in comparison with other systems, and also a diffuse pattern for Sabzevaran fault system.

Active Fault, Seismotectonics, Seismisity, Lut Block, Central Iran