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.

During drilling of the SG-3 Kola well, technological complications in a number of cases resulted in the necessity to sink bypass wellbores. Vertical seismic profiling (VSP) observations were carried out in the deepest of them, including in the depth interval common for different wellbores.