When a volcano erupts, stuff comes out of the ground. Most of the time, it isn't much stuff (and by "stuff", we're talking lava, ash, volcanic gases in varying proportions). But sometimes it's a lot.

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Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Dan Dzurisin, geologist with the U.S.

Yellowstone as a volcanic system may seem unique, with its history of huge explosive eruptions and lava flows. But did you know that there are similar caldera systems spread across the globe? And many ...

Last week’s earthquake in western Montana was the strongest earthquake in the region in 60 years. An initial quake set off 10 smaller earthquakes, with people as far west as Seattle and as far north ...

Deposits and scarp from the July 21, 2014 landslide in the Askja caldera, Iceland. Photo by Capture from RUV.is video. Most volcanoes are inherently unstable features. They are constructed of loose ...

Steamboat Geyser eruption seen through the trees in Yellowstone National Park on September 17, 2018. (Photo by Jacob W. Frank/ National Park Service) The Yellowstone region today is wonderland. It is ...

The city of Mammoth Lakes sits on the edge of the Long Valley Caldera formed around 700,000 years ago. This caldera is 15 miles in diameter and is North America's second largest. 1. The Long Valley ...

A giant, undiscovered volcano may exist beneath the waters surrounding a group of small islands off Alaska’s Aleutian chain, according to the American Geophysical Union. John Lyons/USGS. A giant and ...

A deer searches for food on July 9, 2024, at Yellowstone National Park. (Pat Sutphin for the Idaho Capital Sun) The Yellowstone region today is wonderland. It is full of spectacular geysers and ...