NEW SEISMOTECTONIC ZONING MAP OF IRAN

This paper reports a new seismotectonic zoning map for Iran, which is developed based on the latest data on active tectonic, topography, magnetic intensity and seismicity catalogue. In this paper, we aim to provide a useful basis for further studies on seismic hazard analysis.To specify different seismic sources, two different active fault maps (Hessami, 2003 and Berberian, 1976) are used. The topography map is from National Cartographic Center of Iran, and the magnetic intensity map is developed by Geological Survey of Iran in 1998. The seismicity data which is used in this study is from a new updated earthquake catalogue for Iran. The report of earthquakes corresponding to a region limited by latitudes 23°W–42°E and longitudes 42°–65°N have been collected. The active fault traces and magnetic intensity data have significant role in defining the intersections and final boundaries of some zones. New map divides Iran into 29 zones with different seismotectonic characteristics. Following removal of foreshocks and aftershocks, based on the method described by Gardner and Knopoff, 1974, the completeness of catalogue in each zone is determined

Keywords:

Seismotectonic Zone , Magnitude Of Completeness , Iran