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

USGS scientists are monitoring elevated seismic activity and ground deformation signals at Mount St. Helens this week marking ...

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

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

46 years ago today, Mount St. Helens erupted. The massive eruption sent ash and steam skyward as the north face of the mountain collapsed.

Mount St. Helens experienced a cataclysmic eruption on May 18, 1980. What once was referred to as the “Fujiyama of America” had transformed at 8:32 a.m. in Skamania County, Washington. A 5.1 magnitude ...

Forty-six years ago, Mount St. Helens erupted, killing 57 people in the aftermath. Mount St. Helens, which is located in Washington, about 55 miles northeast of Portland, Oregon, and 95 miles south of ...

SKAMANIA COUNTY, Wash. — Forty-six years ago today, Mount St. Helens unleashed one of the most devastating volcanic eruptions in United States history, transforming the Pacific Northwest landscape in ...

On May 18, 1980, Mount St. Helens erupted in the U.S. state of Washington in one of the most destructive volcanic events in modern American history. A ...

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 ...