ИСТИНА

QGIS is a commonly used open-source geographic information system. The DDLAFS is the plugin in Python. It is developed as a collection of functions that allow one to calculate the dominant strike value of the regional active fault system, note that it can be a number of optional directions. The plugin provides an estimate of the dominant directions of the local active fault system within the certain distance from specific point object g. The set of g objects can be the main shock epicentres, seismogenic nodes, regular grid points and etc. We consider Wells and Coppersmith, 1994 earthquake linear dimensions for evaluating the radius R of the circle area. In the WGS84 geographical coordinate system the Vincenty, 1975 area with radius R, and center g outlines the linear objects from active fault database. The accumulated lengths of the fault segments are estimated for each of n direction bin. Therefore, a given g can be associated with n directions with the empirical probability density distribution of the fault azimuths {ψi, pi | i = 1, … n; ∑pi = 1}. The DDLASF plugin is designed as the part of an anisotropic model of the seismic impact in terms of macroseismic intensity by Nekrasova and Kossobokov, 2022.