Estimation of stress tensor is particular importance for any structure; This is because the sliding plates of faults are affected by the tensor stress and geometric arrangement of the fault plates, which in turn contributes greatly to the selection of the damping relationship and the presentation of the geostationary pattern and ultimately to the direction of strong ground motion in the structure.
Estimation of tectonic stress and subsequent sliding directions of fault blocks are estimated by using different methods and in this article, using the Angelier method, this article has been done in the northwestern region of Birk Mountain, located in the Flysch zone of eastern Iran in Sistan and Baluchestan province, and in order to confirm it, respectively, the method of solving the focal mechanism of earthquakes (Sadeghi et al 2006, Partabian et al 2016, Fatehi et al 2017) and the Iranian Geometric Map (Dehghani and Markis 1983) were used and with previous work done (Jackson and Mackenzie 1984, Berberian 1986, Wyss 1993) as well as recent research (Berberian and Yates 2001, Nilforoushan et al 2003, Vernant et al 2004 ,Berberian 2005) were measured and compared, and finally combined with measurements and observations. Silver in the region, to conclude in order to overcome the stress and slip vector dominant in the study area are discussed.