Abstract. Tectonic phenomena, the origin of most earthquakes, and as you know, the fault is a major factor in this phenomenon, therefore, information in this respect is vital. The study determined the seismicity of the area, where the structure will be built there, according to the importance of structure in a certain area is selected, to evaluate the potential of the faults. In this study, analysis of seismicity of the City Behbahan, checked, has a range of 100 km, as confirmed using empirical relationships.