SKAMANIA COUNTY, Wash. - On May 18, 1980, Mount St. Helens erupted, marking the United States’ most deadly and destructive volcanic eruption to date. Around 8:32 a.m., a magnitude 5.1 earthquake shook ...

Add Yahoo as a preferred source to see more of our stories on Google. When Mount St. Helens erupted on May 18, 1980, it caused enormous devastation. The eruption triggered mudslides, an explosion, and ...

This browser does not support the Video element. Saturday marks the 44-year anniversary of Mount St. Helens' eruption in Washington. The blast on May 18, 1980, is the worst volcanic eruption in U.S.

Sunday marks 45 years since Mount St. Helens erupted in Washington state. The deadly eruption happened shortly after 8:30 a.m. on May 18, 1980, following months of small explosions and earthquakes.

It started as a go-for-broke experiment, but it wound up saving an ecosystem.

When volcanoes erupt and ecosystems are under threat, most people wouldn't think of calling in a garden pest for help, but ...

New research offers clues as to why Mount St. Helens is one of the most explosive volcanoes in the Cascade range and why it stands apart from the chain of other Cascade volcanoes. Scientists from the ...

When Mount St. Helens erupted on May 18, 1980, it caused enormous devastation. The eruption triggered mudslides, an explosion, and plumes of ash that did enormous damage. The death of 57 people led to ...