Document Type : Origional Article
Authors
1
Professor, Geomorphology of University of Mohegehgh Ardabili Ardabil Iran
2
Phd student of geomorphology, Faculty of Social Sciences, University of Mohaghegh Ardabili, Ardail, Iran.
3
Department of Natural Engineering, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran.
4
Department of Physical Geography,, Faculty of Social Sciences, University of Mohaghegh Ardabili, Ardabil, Iran.
5
Payam Noor University of Ardabil, Ardabil, Iran.
Abstract
Background and Objective: Seismicity is a measure that encompasses the occurrence, mechanisms, and magnitude of earthquakes in a given geographical location. Thus, it summarizes the seismic activity of a region. Based on geological evidence and recorded earthquakes, the study area is considered one of the active and seismic zones in Iran. Therefore, knowledge of the seismic potential of the region is necessary to prevent unprincipled construction in the study area. The purpose of the present study is to evaluate the seismic potential of faults in the Balharud-Garmi basin.
Methodology: In this study, ArcGIS software was used to draw maps and analyze them. First, using the 1:100,000 geological map of the Geology and Mineral Exploration Organization of the country, the faults (main and minor) in the study area were determined and their lengths were determined. Then, the seismic power of the faults in the study area was calculated using the relations of Zare (1995), Norouzi (1985), and Norouzi and Ashjai (1978).
Findings and Results: According to the relevant results, the average seismic power in terms of Richter in the faults of Nowruzabad is 12.55, Azadabad 10.20, Sari-Nasirlu 28.62, Ilikhchi 9.08, Chenar 6.56, Farzi-Kandi 17.42, Parchin 10.35, Ojaq-Alazar 17.94, Demirchi 7.23, Pireh-Khalil 6.55, Qanab 19.16, Shorfeh 7.73, and Shordarq 3.92. The results showed that the study area, especially the central parts towards the south of the basin due to the concentration of fault lines, is prone to seismicity and there is a possibility of earthquakes with a magnitude greater than 4 on the Richter scale. The Sari-Nasirlu, Azadabad and Al-Qanab faults have the highest seismic power in the region, respectively. Studies also show that there is a direct relationship between the seismic power of faults and the length of the fault. Given the lack of sufficient studies on the tectonics and seismicity of the region, other studies should be conducted
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