Officials believe a volcano that erupted in Russia after hundreds of years may be connected to a huge earthquake last week. See video and photos.

The Krasheninnikov Volcano in Russia’s Far East has erupted for the second time in 24 hours, launching a massive ash plume 4 kilometers into the sky. Following an earlier 6km blast, the rare double eruption has stunned volcanologists and triggered aviation alerts across the Kamchatka Peninsula.