Mount Saint Helens in Washington, which notoriously and cataclysmically erupted in 1980 and had its ash reach Montana ...

Weather satellite images helped in monitoring the volcanic ash cloud from Mount St. Helens and activity from other volcanoes such as Mount Etna. Smoke from fires in the western United States such ...

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 ... more than three billion cubic yards of mud, ash, and melting snow—avalanched into it.

Likelihood: While Mount St. Helens is expected to erupt again ... A large eruption could send "a city-sized cloud of ash 20 centimeters thick" to "descend upon the buildings of Mexico City ...

At just after half-past eight in the morning of Sunday, May 18, Mount St Helens ... got plugged up by rocks and ash and trees. Meanwhile, the great, grey cloud drifted at forty miles an hour ...

Rocks hurtled through the ash-filled air. One struck a man ... bubbling cauldrons of mud. Until Mount St. Helens blew in 1980, Lassen's eruption was the most recent volcanic explosion in the ...

Dozens of items that survived the 1980 eruption of Mount St. Helens are once again on display for the general public. “Mount ...

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 ...