Ecological Systems and Devices Annotation << Back GEOSPATIAL CONDITIONS FOR THE FORMATION OF LANDSLIDES ON THE TERRITORY OF SAKHALIN ISLAND S.V. Rybalchenko The paper considers the conditions for the formation of landslide-prone areas of Sakhalin Island, the intensity of development and the main characteristics of landslides of various types common on the territory of Sakhalin Island, determined by the geospatial position of the territory. It is in connection with the geospatial position of the territory as a result of the tectonic and geological history of its development that the modern relief, in addition to extensive sedimentation basins, is represented by steeply inclined erosion-denudation and abrasion forms of macro- and mesorelief with high potential energy, overlain by powerful layered signifi cantly dislocated and structurally disturbed terrigenous strata, represented by relatively weak rocks, the accumulation of which occurred as a result of cyclical sedimentation in variable conditions of deep, shallow and coastal character. The tectonic and accompanying seismic activity, as well as the geological history of the formation of the terrain, led to the formation of complex engineering-geological and hydrogeological conditions of the territory. Also, the marginal position of the region determines its monsoon climate with high cyclonic activity, which leads to an overall high moisture content of the territory and activation of exogenous processes. Thus, precisely due to the geospatial position of Sakhalin in the transition zone, a whole complex of natural factors of landslide formation has formed on the territory, including global factors (tectonic, climatic) and subordinate determining factors, as well as secondary (trigger) factors (geomorphological, geological, hydrogeological, seismic), contributing to the widespread development of modern active landslides of various according to its scale, characteristics, as well as the types of landslide process and the mechanism of displacement of rocks. Keywords: landslide, landslide hazard, transition zone, geospatial position, exogenous process. DOI: 10.25791/esip.6.2023.1375 Pp. 23-33.