The 1980 Mount St. Helens eruption began with a steady series of earthquakes in March. By April it began spewing smoke, ...

Researchers found that a potential powerful earthquake combined with rising sea levels could lead to a mega tsunami.

MOUNT ST. HELENS, WA - OCTOBER 19: Cars travel away from the Coldwater Ridge visitors center on State Road 504 with Mt. St.

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.

A volcano in the Pacific Northwest is showing signs of activity with an eruption imminent. The Axial Seamount is a mile-wide ...

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

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

Stunning, historic front-page coverage from The Oregonian reporters Les Zaitz and Steve Jenning reports the confusion and ...

The Axial Seamount is located 300 miles off of the coast of Oregon. Researchers say it’s following patterns shown before its ...

The volcano is thousands of feet below the ocean’s surface, so it poses no danger to people. But under all that water, a ...

Color photos shot in 1980 from the cockpit of a Cessna 150 reveal the magnitude of Mount St. Helens' ash and destruction amid volcano's eruption.