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Landslide bodies in tectonically disrupted rock massifs most often have complex spatial forms, highly heterogeneous structure and degree of water saturation. The results obtained by our team show the great effectiveness of the ERT (Electrical Resistivity Tomography) method in mapping these phenomena. With an example of a researched site in the Rhodope Mountains, Southern Bulgaria, the possibilities of the method for determining the spatial limits of the landslide body and for differentiating within its scope zones of secondary change and disintegration of the rock massif, as well as sections by degree of water saturation, are illustrated.