A massive cloud of ash has formed over Mount St Helens in Washington, sparking fears that the deadly volcano is showing signs of an eruption. Images from the US Geological Survey's (USGS) web cameras ...

Autopsies showed that most of the people killed in the eruption likely died from asphyxiation after inhaling hot ash, according to the USGS. Truman, who owned a lodge on Spirit Lake for more than 50 ...

When Mount St. Helens erupted on May 18, 1980, the landscape changed in an instant—the geologic version of an instant, anyway. It was the deadliest eruption the United States had ever seen, leveling ...

Washington’s Mount Rainier has been sending up a flurry of strange signals for days, briefly raising concern that something inside the volcano might be shifting. This towering stratovolcano looms over ...