18 American volcanoes get a 'very high' threat rating from the USGS

18 American volcanoes get a ‘very high’ threat rating from the USGS

Of the 161 volcanoes found in the United States, 18 of them are considered a “very high” threat in any eruption scenario. That’s a stat from the ” 2018 update to the U.S. Geological Survey national volcanic threat assessment.” As the mouthful of a title sugge…

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