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The landslide activity in the area of Bolshoy Sochi (Big Sochi) situated at the Black Sea coast of the Great Caucasus has been studied using the StaMPS PS-InSAR method. We incorporated three sets of radar images from the satellites with different wavelengths ALOS, Envisat and Terra-SAR-X from both ascending and descending tracks which cover the time period from January 2007 to September 2012. Comparative investigation of surface displacements obtained from all the data sets is presented. Areas where high surface displacement rates have been located on the base of the satellite data coincide well with zones of high landslide activity according to ground observations. We constructed time series for the two landslides: in the Baranovka and Mamaika villages where considerable surface movements had been observed during the time of acquisitions. Analysis of the time series made it possible to determine periods of activity and relative stability of the landslides and compare them with ground observations.

[1] This paper examines modern tectonic processes and the state of stress in the North Caucasus along three profiles that cross its eastern, central, and western parts. Using the models of crustal structure along these profiles, we solved the following inverse problem: to find boundary conditions (in this study, velocity at side boundaries and bottom of the model) that provide the best fit of calculated vertical movements at the top of the model and vertical neotectonic movements during the late Quaternary. Our modeling shows that during the late Quaternary, geodynamics of the eastern and central parts has been controlled by regional intraplate compression normal to the Greater Caucasus belt. The western part has been strongly influenced by tectonic processes taking place in the Eastern Black Sea. The calculated slow flow patterns and stress fields showed good agreement with the distribution of seismic events, results of focal mechanisms inversions, and GPS data.

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