Nearly 45 years after Mount St. Helens' eruption sent almost 90 billion cubic feet of debris into the upper Toutle Valley, ...

Is it getting ready to rock? Mount Saint Helens in Washington, which notoriously and cataclysmically erupted in 1980 and had ...

WA leaders are reassessing their plans for the possibility of an eruption at Mount Adams or Mount St. Helens. Dozens of local, tribal, state and federal officials gathered virtually and in-person ...

The sediment retention dam in Toutle has become less and less effective as it fills, switching from catching about 80% of passing sediment to allowing 80% to pass, according to ...

Experts are sounding the alarm over how the Department of Government Efficiency's latest spending cuts may trigger a deadly volcanic disaster along the West Coast. As Elon Musk's sprawling cuts ...

This story appears in the May 2010 issue of National Geographic magazine. Beer cans once lay at the bottom of Spirit Lake. Mark Smith remembers them perfectly: 20-year-old Olympia flattops, their ...

A very common case study for volcanoes is the eruption of Mount St Helens in the USA in 1980. Other case studies include the eruption of Mount Etna in Sicily in 1974 and Heimaey eruption in ...

Alaska's Mount Spurr volcano is close to erupting, according to scientists. The volcano is "releasing unusual levels of volcanic gases near its summit and from a flank vent that last erupted in ...

This story appears in the August 2009 issue of National Geographic magazine. Update: Our new Yellowstone National Park stories may surprise you with pictures of Yellowstone's remarkable animals.

(This program is no longer available for streaming.) One of the most violent natural disasters of our time, the colossal eruption of Mt. St. Helens in 1980 blasted away an entire mountainside.

Nearly 45 years after Mount St. Helens’ eruption sent almost 90 billion cubic feet of debris into the upper Toutle Valley, millions of tons of sediment still pour into the Cowlitz River each year.