Ash from the catastrophic 1980 eruption of Mount St. Helens began to swirl around the volcano this week, creating a smoky haze that obscured its summit.

For a moment, it seemed like a blast from the past: a plume over Mount St. Helens on Tuesday looked like the volcano might be ...

Learn more about the volcanic island of Nishinoshima and how its frequent eruptions are helping scientists understand how ...

A 2014 astronaut photo shows a pair of volcanic lakes appearing to stare up into space from the Chiltepe Peninsula of ...

NOAA explorers discovered a massive underwater mountain near Palau using sonar mapping during ocean exploration cruise.