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.

Volcanic activity bubbling away beneath the Yellowstone National Park in the US appears to be on the move. New research shows that the reservoirs of magma that fuel the supervolcano's wild outbursts ...

Kīlauea seems to be in a shaking kind of mood after Episode 40 of its ongoing episodic lava-fountaining eruption at the summit ended Monday (Jan. 12), with a third swarm of earthquakes rattling the ...

The Kilauea volcano erupted Monday morning on Hawaii's Big Island following increased earthquake activity beneath its summit, according to the U.S. Geological Survey. The volcano is located along the ...

Buried beneath the high desert on the Oregon–Nevada line, an ancient volcanic scar is suddenly being talked about in the same breath as Saudi oil fields. Researchers say the McDermitt Caldera holds ...