18 very high threat volcanoes
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 suggests, the report lays out which volcanoes in the U.S. have the greatest chance of erupting. The last such report from the USGS was issued in 2005.
