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

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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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