Kamchatka, Russia hosts some of the most active volcanoes on earth. Among those is Kliuchevskoi stratovolcano, erupting almost constantly, and the tallest volcano in Kamchatka. In this snow-covered winter image (left), an eruption plume rising to 7.5 km, is streaming from the summit in a northeast direction. The thermal infrared image (right) reveals additional information: the bright material on the east side of the summit is a hot, recent lava flow; the eruption plume is displayed in blue, revealing its composition as dominated by ice mixed with ash. The thermal data are noisy because of the very low signal from the cold scene. The data were acquired December 2, 2020, cover an area of 27 by 30 km, and are located at 56.1 degrees north, 160.7 degrees east. https://photojournal.jpl.nasa.gov/catalog/PIA24282