Аннотация:A method for determining the focal mechanisms of earthquakes using the S-wave polarizationdirection for weak close seismic events is developed based on the detailed seismological studies carried out bythe seismological expedition of the Institute of Physics of the Earth of the Russian Academy of Sciences in1999–2001 near the Bushehr nuclear power plant (NPP) in Southern Iran. The results of the reconstructionof such determinations are compared with the focal mechanisms of strong earthquakes determined in ISCcatalogs using the standard method and with modern concepts of tectonic deformation of the earth’s crust ina wide vicinity of the region under consideration. It has been established that this reconstruction is in goodagreement with both the typification of movements in the foci of strong earthquakes and modern conceptsabout the nature of the deformation of the earth’s crust within the observation network. This allows us to rec-ommend this method for reconstructing focal mechanisms in other regions.