The design, construction and operation of various engineering structures in the conditions of development of dangerous geological processes requires a detailed study of the site. One of these dangerous geological processes is landslides. When studying landslide arrays, the most priority task is to study its structural features. According to existing concepts, landslide arrays composed of clay soils are characterized by a sufficiently difficult heterogeneous structure. As a result of stretching and compressive stresses, numerous breakings are observed in them in the form of landslide cracks, weakened zones are formed, which largely determine the stability of the slope. Clay soils that make up the weakened zones in the body of the landslide, including the sliding zone, are disintegrated, and there is a weakening of structural links and an increasing in humidity. The analysis of correlations between the propagation of longitudinal and transverse waves in clay soils, depending on their humidity, obtained in the laboratory, together with the materials of 1D and 2D engineering seismic survey and electrotomography materials, provided the selection in the section of the landslide slope of the border of soils with humidity coinciding to the maximum molecular moisture capacity, as well as soils with a destroyed structure, which allows determining the spatial location of the slide zone of the landslide.