Abstract

Dorouneh fault is the largest fault in Iran after the main Zagros fault, also known as the Big Desert fault, which is about 700 km long. Based on 1) Polarization (polarity) of the first P-wave onset, and 2) Combining the polarization of the first P-wave onset and the ratio of P to S amplitudes we have done fault plane solution. The Dorouneh fault continues in the northeast of central Iran, from Nain, in a northeast-southwest direction to the Dorouneh area in the southwest of Kashmar, and the Dorouneh, with an east-west trend, with a curvature to the south, continues to the Iran-Afghanistan border. Along this fault, the blocks have moved in both left and right directions, but without a doubt, one of its last movements is of the right lateral type. The results of focal mechanism calculation for significant recent decade events around Dorouneh fault show mostly left lateral strike slip which is consistent with the tectonic setting of the region.