The Yellowstone Caldera, a volcanically active region under and around Yellowstone National Park, has long been the subject of research, speculation and science fiction regarding the possibility of a ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Liv Wheeler, M.S. student, and Stacy ...

Videos of animals appearing to flee Yellowstone National Park have gone viral, leading to speculation that the park’s infamous “supervolcano” may be about to blow. Climate website Green Matters ...

This photo shows the exposure of the Mount Jackson Rhyolite Series vitrophyre at Gibbon River. Boulders of weathered, lichen-covered rock show how easy it is to overlook these new units. (Photo by Liv ...

Could a geological disaster be brewing beneath the surface of Yellowstone National Park? Many scientists and curious ...

A caldera—like the one at Yellowstone Park spanning parts of Wyoming, Idaho and Montana—is a large depression or hollow formed when a volcano erupts and the magma chamber beneath it empties, leading ...

Kenneth Sims and other research scientists recently discovered that mafic volcanism of Henrys Fork Caldera, which is located in eastern Idaho and west of Yellowstone National Park, occurred ...

Yellowstone National Park is cradled inside a gentle depression created by a giant volcanic eruption 640,000 years ago. The ground collapsed, leaving a bowl-shaped caldera. It was the third in a ...