Seismic security

A supervolcano in Utah? It's 30 times larger than Yellowstone

Yellowstone's famous caldera, which last went off more than 640,000 years ago, can lay claim as North America's most well-known supervolcano.

But it isn't the continent's largest — a more ancient one found near the small southwestern Utah town of Enterprise, was about 30 times bigger.

Aspects of the geological landscape that Southern Utah is famous for – Pine Mountain, Veyo volcano and lava flows – come from volcanic activity in the area, all stemming from the supervolcano "Wah Wah Springs."

But Wah Wah Springs week-long explosion happened a long time ago. Like 30 million years ago. Should you be concerned about supervolcanoes and volcanic activity in this part of the United States?