In the shadow of a recent 8.7 quake, Russia's Kuril-Kamchatka Arc braces for another seismic event, this time at a smaller 6.8 magnitude.

Tsunami waves were possible in three areas of Kamchatka in Russia's Far East, the nation's Ministry for Emergency Services said on Sunday (Aug 3) after a 7.0 magnitude earthquake hit the nearby Kuril Islands.

The overnight eruption of the Krasheninnikov Volcano in Kamchatka, its first in 600 years, may be connected to the huge earthquake that rocked Russia’s Far East last week, Russia’s RIA state news agency and scientists reported on Sunday.