Both incidents could be connected to the huge earthquake that rocked Russia's Far East last week, that triggered tsunami warnings as far away as French Polynesia and Chile, and was followed by an eruption of Klyuchevskoy, the most active volcano on the Kamchatka Peninsula.

Russian volcano erupts after centuries of dormancy, spewing hot ash into sky and triggering 7.0-magnitude earthquake with tsunami warning on Kamchatka Peninsula.