Aerial view, looking southwest, of Ugashik caldera adjacent to Peulik volcano. At least five lava domes (snow-covered in this view) presently occupy the floor of the 5-km (3 mi)- diameter caldera. Photograph by M.E. Yount, U.S. Geological Survey, April 11, 1984.
Image courtesy of AVO / U.S. Geological Survey.