Study of seismicity of major segments of north Tabriz fault by Kijko method

In this study 3 major segments of the North Tabriz fault, northern, central and southern parts, were selected to analyze the seismic potential of the fault. For this purpose earthquake data since 1900 to 2014 from the Institute of Geophysics of University of Tehran and its local station, Tabriz seismological centre, Was prepared. Therefore data bank including 2850 earthquakes, for fault zone was obtained. Then, by method of Knopoff, foreshocks and aftershocks in data catalogue were omitted to have single and independent events. Then Seismic parameters include, rate annual event, activity and probability return period of earthquakes for  period of 50,100 and 475 years in terms of magnitude for 3 major segments of North Tabriz fault by Kijko method were analyzed. Finally results for three segments were compared in probability return period of earthquakes for central, northern and southern segments to obtain differences. Analyses results of this research have shown return period for destructive earthquakes of Tabriz fault (for magnitudes 6 to 6.5 in Richter scale) is 475 years.