Some Pacific Northwesterners woke Tuesday to an unusual sight: A smoky haze shrouded Mount St. Helens, the large, active stratovolcano in Washington state that erupted catastrophically in 1980. But a ...

When Mount St. Helens exploded in May 1980, a magnitude-5.1 earthquake triggered a lateral blast that stripped forests, buried valleys in ash, and left a gray, seemingly lifeless moonscape. For years, ...

On May 18, 1980, the United States experienced the deadliest and most destructive volcanic eruption in its history. After more than two months of rumbling, Washington state's Mount St. Helens erupted ...

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.

Before May 18, 1980, the United States had seen only one serious volcanic eruption. The nation certainly had not seen ash shoot 80,000 feet in the air, nor had it seen destruction on the scale and ...

ST HELENS, Wash — Engineers who spent the days and years following the 1980 eruption of Mount St. Helens working on the recovery of the region, returned Tuesday to check in on some of their work.

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’ ...