Global Volcanism Program | Image GVP-05303
A plume emitting from active fumaroles is on the N side (left center) of the summit lake at Douglas volcano on the northern tip of the Alaska Peninsula. The small, 160-m-wide crater is one of the few ice-free areas on Douglas volcano. In 1992, the lake had a pH of 1.1 and a temperature of 21°C.
Photo by Chris Nye (Alaska Division of Geological and Geophysical Surveys).