Alaska Volcano Observatory

A cross section of the 1912 ash flow exposed by the River Lethe in the Valley of Ten Thousand Smokes, Katmai National Park and Preserve, Alaska. In places the ash flow is up to 200 m (660 ft) thick. Photograph by S. McNutt, Geophysical Institute, University of Alaska Fairbanks, July, 1993.

Credit: Image courtesy of AVO / University of Alaska Fairbanks, Geophysical Institute.
Use Restriction: Please cite the photographer and Alaska Volcano Observatory / University of Alaska Fairbanks, Geophysical Institute when using this image.
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