In 1958, I.V.Litvinenko laid the foundation for seismic studies of the consolidated earth crust on the Baltic Shield: for the first time, depth seismic soundings were performed in Karelia.

Deep seismic studies (GC3) in the eastern part of the Baltic Shield were carried out by joint efforts of several organizations (PGO "Sevzapgeologia", LMI, etc.) under the scientific guidance of Professor I.V.Litvinenko.

In 1980 in the northwestern part of Ladoga and southwestern Karelia the production and geological association Sevzapgeologia and the Problem Research Laboratory of geological and geophysical studies of the Baltic Shield of the G.V.Plekhanov Leningrad Mining Institute conducted deep seismic studies by methods of deep seismic sounding and exchange waves from distant earthquakes (MOB3) along the profile and the Problem Research Laboratory of Geological and Geophysical Research of the Baltic Shield of the Leningrad Year Institute named after G.V. Plekhanov conducted depth seismic studies by methods of depth seismic sounding (DSS) and exchange waves from distant earthquakes (MOVZ) along the profile of Lahdenpokhya - Lake Segozero, which is hereinafter referred to as the Priladozhsky ...

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 ...

On the Baltic Shield, in foreign and Soviet parts of it, to date, a large amount of work has been carried out by methods of explosive and conventional seismology, allowing to determine the sole of the consolidated crust - the Mohorovičić discontinuity (M) - in its various areas.