The Grand Prismatic Spring at Yellowstone National Park sits in the Yellowstone Caldera, which formed 631,000 years ago (Image credit: Holger Leue/Getty Images) ...

A caldera is different from a crater, which is a smaller depression formed when a volcano erupts and sends rock exploding outward. Yellowstone National Park is home to a famous caldera, measuring ...

The latest eruption within Kilauea volcano’s Halemaumau crater “ended abruptly at 10:25 a.m.” today after another brief but ...

Arsia Mons, one of the Red Planet's largest volcanoes, peeks through a blanket of water ice clouds in this image captured by NASA's 2001 Mars Odyssey orbiter on May 2, 2025.

This is the 26th lava fountaining episode recorded at Kilauea since December. Kilauea is one of the world's most active volcanoes.

These fiery peaks have belched up molten rock, hot ash, and gas since Earth formed billions of years ago. Get more information about volcanoes from National Geographic. 1 of 13 ...

The last caldera-forming eruption at Yellowstone "was much more complex than previously thought," according to the annual report about activity at the supervolcano. The last super-eruption at ...

A caldera is different from a crater, which is a smaller depression formed when a volcano erupts and sends rock exploding outward. Yellowstone National Park is home to a famous caldera, measuring ...

Episode 25 of Kilauea Volcano’s on-again, off-again eruptions ended at 8:08 p.m. today after eight hours of continuous ...