On May 18, 1980, the United States experienced the deadliest and most destructive volcanic eruption in its history.

Mount St. Helens erupted, killing dozens and forever changing how the US monitors earthquakes. The volcano is still active ...

The 45th anniversary of the catastrophic eruption of Mount St. Helens is on May 18. Here's what to know and when the volcano ...

Mount St. Helens stood silent for over a century in Washington’s Cascade Range, but that all changed 45 years ago Sunday when ...

Parks staff say new exhibits will center the eruption in the ongoing story of the mountain rather than treating it as a ...

Sunday marks 45 years since Mount St. Helens erupted in Washington state. The deadly eruption happened shortly after 8:30 a.m ...

A group of retired US Army Corps of Engineers members reunited at the Sediment Retention Structure just three days after the 45th anniversary of the Mount St. Helens eruption.

57 people died in the eruption, but the disaster gave scientists a way to develop monitoring tools, improving their ability ...

According to the USGS, Mount St. Helens is the most active volcano in the lower 48 states and the most likely in the Cascades to erupt again.

The May 18, 1980, eruption of Mount St. Helens in southern Washington claimed 57 lives and blasted the terrain of old-growth ...

Ash, rock and hot gasses spewed into the air ... Seismic activity around Mount St. Helens quieted after the mid-80s. According to the USGS, the area experienced the fewest earthquakes since ...

Michael Cairns flew a National Guard helicopter on a rescue and recovery mission to Mount St. Helens. His book, "Under the ...