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Here Are All The Volcanoes In The US — And How Dangerous They Are - Business Insider

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Oregon's Crater Lake volcano, part of the Cascade Range, is among the very high threat volcanos identified by the USGS.

If the recent volcanic eruption in Iceland has got you wondering which volcanoes you should be worrying about, and exactly how much to worry about them, you're in luck.

The United States Geological Surveys Volcano Hazards Program has all the volcano maps and charts you need to make an informed decision about your level of volcano-induced anxiety.

There are 55 dangerous volcanoes in the US. A caveat: this is not a ranking of the volcanoes by their danger level.

As Wendy Stovall, a geologist with USGS, told Business Insider in an e-mail:

There are many volcanoes that are threatening due to factors such as tectonic setting, population density, eruption frequency, and potential to erupt again. The variations in these factors make each of the NVEWS [National Volcano Early Warning System]-designated 'high threat' volcanoes uniquely dangerous.

For a full list of volcanoes by threat level, and a thorough description of how they're monitored, check out pages 20 and 21 of this 2005 volcano report from the USGS. More up-to-date information on individual volcanoes is available on the website for the USGS Volcano Hazards Program.

The volcanoes designated as "Very High Threat" are near large population centers and have the potential to erupt explosively and to trigger lahars — swift, massive landslides of water, mud, and debris that rush downstream after an eruption.

Many of the "High Threat" volcanoes are near smaller population centers and power or transportation infrastructure throughout Alaska. Some of these erupt more frequently, posing significant threats to aviation. ...more

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