A gigantic bulge in the north rim of the Yellowstone caldera is the latest sign of volcanic activity in the national park.

Scientists are monitoring a city of Chicago-sized swath of rising ground at the northern volcanic rim of the Yellowstone ...

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

Experts have dismissed the possibility of an eruption, saying, 'It’s Yellowstone being Yellowstone.' ...

Scientists monitored the El Chichón volcano's movements and recorded some changes in its crater.

Did anyone else grow up in perpetual fear of any and all natural disasters? I don’t know if it was cartoons or what, but as a ...

Learn more about the rare instances when seismic and magma activity overlap in Yellowstone National Park.

From Niagara Falls to the Redwood Forests, state parks preserve many of the nation’s iconic landscapes and historic treasures. With more than 10,000 to choose from, here’s a look at one from each ...

Yellowstone is a dynamic geologic system—the one constant is change. This is demonstrated daily by hydrothermal activity ...

But some refused to evacuate during the hazardous lava fountaining episode.

A volcano in Russia's far east on Wednesday spewed ash several kilometers into the sky, authorities said, putting on a ...

"What makes the event even more extraordinary is that it did not involve a single volcano, but multiple active sources." ...