Eastern Russia’s Kizimen is a growing stratovolcano, like Shiveluch, its neighbor to the north. In this natural-color satellite image, volcanic debris covers the south and east slopes of Kizimen. A plume of gas and ash rises from the summit, while wind-blown ash obscures a lava flow on the eastern flank. Early-season snows cover the landscape surrounding the volcano. The snow provides an easy way to date volcanic activity—any visible debris avalanches or ashfall must have occurred after the last snowfall.