Among the natural risks that we don't think about too much inthe U.S. are volcanoes.

Sure, we all know about Mt. Saint Helens in Washington, and thelingering eruption risks along the West Coast, but for most of usvolcanoes are something that happen “somewhere else” that presentlittle direct risk to our lives and livelihoods. (Except for theoccasional eruption in Iceland that diverts air traffic intoEurope. How annoying.)

Truth is, most of us are wrong.

Recent rumblings around Yellowstone National Park in Wyominghave raised concerns that the local supervolcano (like a sharknado,but a real thing that in no way involves sharks) could be wakingfrom its slumber, and increased eruption on the island of Hawaiiforced a number of local residents from their homes last month.

The risks are real, experts says, and we may be dealing withthem more and more in the future.

But where are the risks highest? Business Insider took a look atthe 18 volcanoes that are ranked as “very high threats” bythe United States Geological Survey's Volcano Hazards Program,presenting them in no particular order.

Spoiler alert: Alaska features heavily.

Click to see the volcanoes at Business Insider.