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The U.S. Geological Survey said that it is classifying 18 volcanoes in the United States as having a “very high threat,” and it classified the Yellowstone volcano in Wyoming as “high.” The USGS updated its volcano threat assessments list for the first time since 2006.
It added: “The high- and moderate-threat categories are dominated by Alaskan volcanoes. In these categories, the generally more active and more explosive volcanoes in Alaska can have a substantial effect on national and international aviation, and large eruptions from any of the moderate- to very-high-threat volcanoes could cause regional or national-scale disasters” Threat scores rose for Oregon’s Newberry Volcano as well as Wyoming’s Yellowstone. The Yellowstone caldera is listed as “high” by the USGS. There are 161 active volcanoes in the U.S.
originally posted by: Navieko
a reply to: SituationNAFU
Yeah you're right, they've just done a revised threat level assessment which is based on the projected threat if a volcano erupts. What baffles me is how they considered Yellow Stone to only be a 'moderate' level threat prior to this assessment, and still only a 'high' level threat now - considering they have a 'very high' threat level. I would have thought Yellow Stone would top the list.
The updated national volcanic threat assessment presented here is not a forecast or indication of which volcanoes are most likely to erupt next. Rather, it is an indicator of the potential severity of impacts that may result from future eruptions at any given volcano. As such, the assessment can be used to help guide and prioritize volcano research, hazard assessment, emergency planning and preparation, and monitoring efforts by Federal, state, and local government.