These fast-moving mudflows can devastate towns in a matter of minutes.
The 1980 Mount St. Helens eruption remains the deadliest in U.S. history, fundamentally changing how scientists monitor ...
Scientists are sounding the alarm about a little-known threat at America's most dangerous volcano, which could turn ...
Forty-three years ago today, Mount St. Helens erupted, triggering a magnitude 5 earthquake and spewing ash, mud and debris across southwest Washington. The explosion killed 57 people and changed the ...
The most destructive volcanic eruption in United States history happened less than half a century ago in Washington state. On May 18, 1980, the north side of Mount St. Helens, in southwestern ...
May 18, 1980 – 46 years ago. It was mild, sunny Sunday morning. People were walking their dogs, some enjoying their morning ...
Four dozen earthquakes were detected at Mount St. Helens over the last month, but volcano seismologist Dr. Weston Thelen of the United States Geological Survey said it’s nothing to worry about. While ...