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 ...

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

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 ...

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

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. Despite an explosive summer at Yellowstone National Park — marked by a thermal feature eruption ...