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 ...

Something roughly the size of Chicago is quietly pushing the ground upward along the north rim of the Yellowstone Caldera, ...

Yellowstone is a dynamic geologic system—the one constant is change. This is demonstrated daily by hydrothermal activity manifested in geysers, hot springs, mud pots, and other thermal features, but ...

Are we ready for a mega-blast from the supervolcano in Yellowstone National Park?

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

Some of Yellowstone’s past eruptions may be hiding, which makes it difficult to answer how many eruptions occurred in the past and when they occurred.

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

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. Yellowstone is a dynamic geologic system—the one constant is change. This is demonstrated daily ...