Europe's most active volcano has intensified its eruptive activity, with frequent and powerful explosions emanating from its ...

Mount St. Helens blew 45 years ago this week. A young grad with a camera watched the ash fall — and began to understand his calling.

An explosion on Mount Spurr could generate massive cloud of ash, which could mess with airplanes and cause issues for humans.

A towering plume of ash rises in the distance of the photo, swirling with menace and threat, lightning arcing within it. As ...