In geology, even small layers can tell big stories. But figuring out the origins of such small layers can be a challenge, ...

The recent death of a bison at Grand Prismatic Spring is an emphatic example of the danger posed by thermal areas in ...

It happened on Saturday morning, June 21, at the park’s Grand Prismatic Spring, Michael Poland, geophysicist with the U.S.

Hydrothermal explosions happen when hot water in a volcano system flashes into steam in a confined area, Lisa Morgan, an ...

Over the weekend, a bison stumbled into the Grand Prismatic while several visitors could do nothing to save it.

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

In 'A Place Called Yellowstone,' environmental historian Randall K. Wilson traces the natural forces and the human clashes ...

We know the caldera has made three impressive eruptions in its history, 2.1 million years ago, 1.3 million years ago, and about 631,000 years ago, reshaping the area’s landscape. What everyone ...

The last caldera-forming eruption at Yellowstone "was much more complex than previously thought," according to the annual report about activity at the supervolcano. Skip to main content.

The Yellowstone Caldera, sometimes known as the Yellowstone supervolcano, is a volcanically active region in Yellowstone National Park. It measures 55 kilometers (34 mi) by 72 kilometers (44 mi).

The Yellowstone Caldera, which spans 30 by 45 miles wide, formed during one of those eruptions roughly 631,000 years ago. Seismic waves, produced by earthquakes, ...