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


Department of Geology, Faculty of Sciences, University of Birjand, Birjand, Iran


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.


Adams, K.D., Wesnousky, S.G., Bills, B.G., 1999. Isostatic rebound, Active faulting, and Potential geomorphic effectsinthe Lake Lahontan basin, Nevada and California. Geological Society of America Bulletin 111, 1739-1756.
Akasheh, B., 1999. Fundamentals of Geophysics, Peak Culture Publishing, 257pp.
Allen, C.R., 1975. Geologicalcriteria for evaluating seismicity, Geological Society of America Bulletin 86, 1041-1057.
Ambraseys, N.N., Melville, C.P., 1982. A History of Persian earthquakes. Cambridge University Press, Cambridge.
Baniadam, F., Shabanian, E., Bellier, O., 2019. The Kine matics of the Dasht-e Bayaze earthquake fault during Pliocene – Quaternary: implications for the geodyna mics of eastern central Iran. Tectonophysics 1-79.
Berberian, M.,1995. Natural Hazards and the First Earthquake Catalogue of Iran, Vol.1, Historical Hazards in Iran Prior to 1900, AUNESCO/IIEES Publication during UN/IDND International Institute of Earthquake Engineering and Seismology Tehran, 60p.
Berberian, M., Qarashi., M., Arjangravesh., B., Mahajerashjai, E.,1992. Investigating Neo-tectonic, Seismotectonic and Seismic Hazard- Fault in Greater Qazvin and Around. Geological Suevey & Mineral Exploration of Iran, Report 61.
Berberian, M., 2014. Earthquakes and Coseismic Surface Faulting on the Iranian Plateau. Elsevier.
El Hamdouni, R., Irigaray, C., Fernández, T., Chacón, J., Keller, E., 2008. Assessment of relative active tectonics, southwest border of the Sierra Nevada (southern Spain). Geomorphology 96, 150-173.
Gutanberg, B., Richter, C.F., 1954. Seismity of the Earth, 2thed., Printcetion University Press, Princeton, New York.
Navaseri, H., Moussavi, M., Khatib, M.M., Gholami, E., 2018. Seismic Hazard Analysis in the Chahak ­– Mousavieh Range. 38th National Geosciences Congress.
Nikonov, A.A.,1995. Active faults: Definition and identification Problems, Researchon Active Faults, Beijing Seismal Press, 140-152.
Pourkermani, M., Arian, M., 1997. Seismotectonic, Dezab Consulting Engineering Company, 284pp.
Qasemi, M.R., 2004. Seismogenic Springs of Faults and their types, Seismotectonic and Seismic Hazard Analysis Seminar, Institute of Geophysics University of Tehran.