Volcanologists just ranked the most threatening volcanoes in the United States

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Researchers just released an update to the definitive list of most threatening volcanoes in the United States. It’s the first update for the volcano rankings, which were originally published by the United States Geological Survey (USGS) in 2005.

“There are a lot of volcanoes in the US, and they erupt more frequently than most people know,” says Angie Diefenbach, a geologist at the USGS and a co-author of the report. “We have a lot of volcanoes and there aren’t limitless resources. It helps to prioritize where we’re going to be working.” The United States has 161 active volcanoes, and it has experienced 120 volcanic eruptions since 1980.

The highest priorities for geologists like Diefenbach are the 18 volcanoes ranked as very high…

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