Abstract
On the11st of August 2012 northwestern Ahar and northeastern Varzaghan, eastern Azarbayjan province in Iran,were struck by two major earthquakes which measured firstMw =6.4 (6.4onthe moment magnitude scale) at 12:23:15 UTC time and second Mw= 6.2 at 12:34:33 UTC time. Several aftershocks occurred in the cities, the biggest one of which (MW=5.5) happened on the 7th of November 2012 at 6:26:31 local time 9 kilometers away from Varzaghan. In the present article, this area was considered the main earthquake focus along with the two major earthquakes. We attempt to develop determine aftershock trends of the area based on aftershocks. After drawing diagrams and maps, we discover that aftershocks crack at the bottom of the plane in the three main focuses. This means that earthquake activity starts in the west and stops in the east with lower speed and velocity. As a result, earthquakes are more active in the west. In addition, is using surfer, Arc GIS.
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