The formation of Heart Mountain near Cody is a story of a block of rock the size of Rhode Island moving at 700 mph, an ...

“The Yellowstone system is one that’s been stagnant for a long time.” The volcano’s largest eruption, which earned it the title of a supervolcano, occurred 2.1 million years ago.

Scientists sample water from the Firehole River in Yellowstone National Park. The work was done under National Park Service research permit 5194. (Courtesy of the Yellowstone Caldera Chronicles ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Blaine McCleskey, research ...

Learn more about the new hydrothermal feature that appeared last summer in Yellowstone National Park, and how, even though it ...

Tourists and officials were startled by a hydrothermal explosion at Black Diamond Pool in July 2024. Geoscientists are ...

Yellowstone's geology was a hot topic at the AGU meeting. More than 60 presentations touched on the park, whether it was looking at the diet of ancient wolves or activities of helium isotopes.

Yellowstone’s magma chamber is mostly made of a light-colored rock called rhyolite. It spreads out over an area roughly 55 miles long and 30 miles wide and reaches down to a depth of about 10 miles.

If the Yellowstone supervolcano were to erupt — and there’s no indication that will happen any time soon — Billings residents could be up to their chins in ash.