A gigantic bulge in the north rim of the Yellowstone caldera is the latest sign of volcanic activity in the national park. Geologists call this type of bulge “volcanic uplift.” It’s often caused by ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Drew La Pointe, communication ...

Learn more about the past eruptions at Yellowstone National Park and how each new eruption displaced evidence of the past.

The volcanic system beneath Yellowstone National Park is one of the few places on Earth capable of an eruption so large it ...

Aerial photograph of volcanoes of the Islands of Four Mountains. Mount Tana is in the foreground and Mount Herbert, Mount Cleveland, and Mount Carlisle are shown left to right in the background. (John ...

A small group of volcanic islands in Alaska's Aleutian chain might be part of a single, undiscovered giant volcano, say scientists. If the researchers' suspicions are correct, the newfound volcanic ...

Some volcanoes can produce eruptions so powerful they release oceans of dust and toxic gases into the air, blocking out sunlight and changing a planet’s climate for decades. By studying the topography ...

A cluster of mountains in Alaska’s central Aleutian Islands might not be six separate volcanoes but instead could be interconnected as one giant volcano. A team of researchers uncovered evidence ...