Mount St. Helens: Watch video of the 1980 eruption in southwest Washington On May 18, 1980, Mount St. Helens shocked the nation when it erupted after remaining dormant for over a century.

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, ...

For a moment, it seemed like a blast from the past: a plume over Mount St. Helens on Tuesday looked like the volcano might be erupting again. But fortunately, this was not an eruption — just a ...