Evaluation of Chahak fault activity (East Iran) by seismic analysis and tectonic morphology

The presence of active and Quaternary (young) faults in the eastern part of Iran has made this area a seismically active area. There are many ways to identify and evaluate seismic hazard for a range. In this study, two methods of seismic analysis have been used for statistical analysis and tectonic morphological indices and neo-tectonic evidence of Chahak fault activity and seismicity located 30 km from Arianshahr (South Khorasan). Compare these two methods. Finally, by studying and calculating the tectonic indices S, BS, AF, T and Smf that their numerical averages are 1, 1.88, 59, 0.40, 1 and combining them and obtaining the Active tectonic index (Iat) equal to 1.94 as well as seismic survey of Chahak Fault revealed that Chahak Fault has relatively high activity in the study area and it can be said that seismic analysis by statistical method and tectonic morphological analysis is a suitable tool. To estimate the amount of tectonic movements and earthquake hazards are in range to identify and analyze seismic hazard areas as well as seismic springs. To reduce the casualties and financial losses during the earthquake, we can make the most of the benefits of the earthquake and change our view of the earthquake.