Northwest of Iran is a seismically active area. The existence of active northern Tabriz fault in this region and numerous northwest and southeast branches of this fault, as well as faults parallel to it in the north and south of the study region, indicate that the seismic studies on this area are crucial. In this paper, the geographical coordinates of 47.521 and 37.712 with a radius of 100 km were considered and after eliminating the aftershocks using Gardner and Knopoff method, seismic coefficients a and b values were calculated to be 4.72 and 0.87, respectively, these results demonstrated this fact that Torkmanchay in East Azerbaijan, in which high rate of seismic activities occurred recently, is one of the seismically active regions.