In 1976-1979, the production and geological association Sevzapgeologia and the Problem Research Laboratory of Geological and Geophysical Research of the Baltic Shield of the Leningrad Mining Institute performed depth seismic surveys (DSR) in Central Karelia along the profile of the city of Kem - Lake Tulos, which is a continuation of the international geotraverse I, passing from the Alps to the Baltic Shield through the territories of the FRG, Czechoslovakia, Poland and the USSR ...