To residents of a certain age, it almost seems like it was yesterday. But Sunday, remarkably, marks the 45th anniversary of a cataclysmic explosion on Mount St. Helens. In a matter of seconds on the ...

Saturday marks the 44-year anniversary of Mount St. Helens' eruption in Washington. The blast on May 18, 1980, is the worst volcanic eruption in U.S. history, killing 57 people and spewing 520 million ...

Mount St. Helens is located in Washington, about 55 miles northeast of Portland, Oregon, and 95 miles south of Seattle. It is administered by the National Forest Service, not the National Park Service ...

On May 18, 1980- The most powerful volcanic eruption in U.S. history occurred. On May 18, 1980- The most powerful volcanic eruption in U.S. history occurred. Located in Washington State, Mount St.

It was the deadliest volcanic eruption in U.S. history, and its reverberations are still being felt today. Thirty-seven years ago, Mount St. Helens exploded, killing 57 people, leveling more than 250 ...

Learn how stress inside a volcano can make gas bubbles form early, helping explain why some eruptions stay quiet instead of exploding.

Thirty years (and one day) ago, Mount St. Helens blew its top. Or rather, its side. After months of heightened seismic activity, a 5.1 magnitude earthquake caused the flank of the mountain to suddenly ...

Mount St Helens, Washington viewed from Portland, Oregon. Source: Ilan Kelman The volcano Mount St. Helens in Washington state exploded at 8:32 a.m. on May 18th, 1980, exactly 40 years ago.