The 1980 Mount St. Helens eruption remains the deadliest in U.S. history, fundamentally changing how scientists monitor volcanic activity.

Mount St. Helens looked like it might be erupting again. Commercial pilots flying in the area Tuesday reported clouds of fine volcanic ash rising into the air above the collapsed dome of the Cascades’ ...

These fast-moving mudflows can devastate towns in a matter of minutes.

Washington state may not have to worry about hurricanes, but it is volcano country. The United States has 161 active volcanoes – all in the western U.S. – but only 18 are classified as a "very high ...

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 ...

Forty-five years ago on May 18, 1980, Mount St. Helens in the state of Washington violently erupted. Here’s a look at volcanoes, then and now. Today in History: May 7, Nazi Germany surrenders Hey, San ...

PORTLAND, Ore. (KOIN) – Mt. St. Helens may look like it’s erupting, but it’s not. According to the National Weather Service, strong eastern winds on Tuesday have caused volcanic ash from the ‘80s to ...

Peggy Short-Nottage and her husband joined sightseers rushing to Mount St. Helens when volcanic activity escalated in the spring of 1980. Instead of hopping in a car and making the drive to ...