The United States Geological Survey (USGS) had currently tracked US active volcanoes exhibiting eruptions risks, 'with elevated unrest above known background level', and posted Orange code and Watch alert for one volcano and a Yellow code and an Advisory alert for six others across the country. USGS and their Alaska...
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  • Potential
  • Eruptions
  • Volcanoes
  • Geological
  • Exhibiting
  • Elevated
  • Background
  • Advisory