Svir-Oyat paleoseismic event took place in the time interval between 4,5 and 2,0 kyr BP, more likely close to the maximum stage of Late Holocene Ladoga Lake transgression. Seismic structures connected with the earthquake are registered in the 35-km area as I≥8 and in the 50-km area as I≥6 (MSK-64, so magnitude of the event might be more than 6. The seismic event is more likely to be connected with displacement along the side of Pasha-Ladoga paleo-rift (Precambrian) triggered by growing of water mass in Ladoga Lake during the transgression.