Alaska Volcano Observatory

Steaming from the summit crater at Mount Spurr is visible during an overflight on May 14, 2024. The primary steam source is a fumarole (steam vent) inside of the summit crater, but a smaller fumarole is visible on the northeast crater rim. The snow is yellow around both fumaroles, where sulfur is precipitating on the snow from the plume.

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.
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