Photo: 18 Most Dangerous U.S. Volcanoes Include Erupting Alaska Peak



Alaska's Augustine Volcano erupts on Wednesday, January 18 (see another Augustine photo). The volcano is one of 18 designated "very high threat" in a recent U.S. Geological Survey report.



Photograph by Jill Shipman, courtesy Alaska Volcano Observatory/University of Alaska Fairbanks, Geophysical Institute

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