A supervolcano hides beneath Yellowstone Park
Beneath Yellowstone National Park lies a vast supervolcano caldera, a 30 by 45-mile geological powerhouse that fuels the park's iconic geothermal features.
Yellowstone National Park sits atop one of the world's largest supervolcano calderas, a massive depression spanning 30 by 45 miles. This colossal feature formed from explosive eruptions over millions of years, with the last major event about 640,000 years ago. Today, its underlying magma chamber fuels the park's famous geysers and hot springs, visible signs of ongoing volcanic activity.
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