The ground at Yellowstone does not always move quietly, and sometimes it waits for years before suddenly coming back to life. That is exactly what has.

A surprise eruption that shot steam, water and dark-colored rock and dirt dozens of feet into the sky Tuesday sent people running for safety in Yellowstone National Park. The hydrothermal explosion ...

YELLOWSTONE NATIONAL PARK, Wyo. — Yellowstone’s Echinus Geyser—the largest acidic geyser on Earth—is putting on a show with a rare and spectacular reawakening. Yellowstone Explosion Caused By ‘Clogged ...