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.

A teenager when he began scuba diving in the shadow of Mount St. Helens, he remembers the lake as it was before the May 1980 ... want to know what to expect after eruptions of their own.

The Columbia Theatre in Longview, Washington, is celebrating its centennial. Theater officials say the 1980 eruption of Mount ...

Nearly 45 years after Mount St. Helens’ eruption sent almost 90 billion ... Kelso and Longview before much of it dumps into the Columbia on its way to the Pacific Ocean. That 3 million tons ...

A very common case study for volcanoes is the eruption of Mount St Helens in the USA in 1980 ... 1980 with a series of small earthquakes began. After thousands of additional earthquakes and ...

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.