Yellowstone Supervolcano

The Yellowstone Caldera, a.k.a the Yellowstone Supervolcano, is the volcanic caldera located in Yellowstone National Park in the northwest corner of Wyoming, in which the vast majority of the park is contained. The major features of the caldera measure about 34 by 45 miles (55 by 72 km). Based on best geological evidence, the supervolcano erupted 2.1 million, 1.3 million, and 640,000 years ago. Given its size and location, an eruption of the volcano would have a disasterous impact on the world, not just the United States.

Yellowstone Supervolcano
In the second decade of the 21st Century, the Yellowstone Supervolcano erupted, causing a national disaster in the United States.