These fast-moving mudflows can devastate towns in a matter of minutes.

With the recent 46th anniversary of the initial eruption of Mount St. Helens on May 18, 1980, many recalled where they were when it happened, sharing photos of the towering volcanic plume, ...

The scientists suggest it would take less than an hour to cause huge destruction ...

Experts fear that Mount Rainier could unleash deadly mudflows and flatten three nearby towns within minutes.

This discovery can help improve forecasts, risk maps, and response plans.

A short Washington hike takes you from quiet woods into an ancient lava tube that feels mysterious, cool, and unforgettable.

Earth’s largest volcanic system, hidden in mountain chains under the sea, has long been assumed to erupt only quietly. The ...

CLEVELAND, Ohio — Skywatchers in Northeast Ohio and beyond will get a “once in a blue moon” moment this weekend — but don’t ...

Scientists are sounding the alarm about a little-known threat at America's most dangerous volcano, which could turn ...

Astronomy is full of misnomers. The blue micromoon of May 30 will not be blue. Nor will it be particularly “micro” in size.