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

Monday, May 18, 2026 marks a somber anniversary for the Pacific Northwest and the country. It was on that date 46 years ago that Mount St. Helens erupted in Washington state. 57 people were killed by ...

Mount St. Helens in Washington State was once the "Mount Fuji of America"—admired for its symmetrical cone shape similar to Japan's highest peak. It was a popular Pacific Northwest destination, ...

This week marks the 46th anniversary of the devastating eruption in 1980, and USGS researchers are observing heightened seismic movements and ground deformation at Mount St. Helens. There has been an ...

PORTLAND, Ore. — Monday marks 46 years since the catastrophic eruption of Mount St. Helens, one of the most destructive volcanic events in U.S. history. On May 18, 1980, the Washington volcano erupted ...

With the recent 46th anniversary of the initial eruption of Mount St. Helens on May 18, 1980, many recalled where they were ...

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 ...

That came after scientists received reports of a large plume rising above the volcano, which turned out to be volcanic ash from the 1980 Mount St. Helens eruption. “It kind of looks like a brownish ...

ST HELENS, Wash. — It may look a bit like it, but Mount St. Helens is not erupting Tuesday morning. The ash you can see blowing around the volcano is actually remnants of the infamous 1980 eruption.

The May 18, 1980, eruption of Mount St. Helens remains the deadliest and most destructive volcanic event in U.S. history, claiming 57 lives and flattening 230 square miles of forest. The blast sent a ...