Alaska Volcano Observatory

Near vertical view down into the summit crater of Mt. Spurr volcano. The once snow-and-ice-filled crater melted out during heat flux to the summit in 2004-05. The crater is slowly re-filling with snow and ice but has a persistent fumarole field on the northern crater floor that has slowed the accumulation of snow. Image taken during the annual Cook Inlet volcanoes gas-measuring flight.

Credit: Image courtesy of AVO/USGS.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.