Over the centuries, Mount St. Helens has gone through phases of explosive eruptions and periods of rebuilding itself with magma eruptions. Geologists expect future dome-building eruptions at the ...

In the battle between mountains and ice, the cold stuff usually wins. Over time, glaciers can grind down tall peaks like buzz saws. But at Mount St. Helens in Washington, a swelling lump of lava ...

SEATTLE - Magma that has been rising inside Mount St. Helens after weeks of earthquakes and steam eruptions has finally pushed its way to the surface, forming a new lava dome just behind the ...

Mount St. Helens' mountainous wake-up call. ... As witnessed from the hiking route on Monitor Ridge over the past 40 years, a new lava dome continued to re-form in the center of volcano’s crater.

About 400 earthquakes have rumbled under Mount St. Helens since mid-July, the largest chain of shakes since the volcano finished erupting in 2008, the U.S. Geological Survey reported last week.

Steam rises from Mount St. Helens’ lava dome recently. Climbing on the mountain reopened in 2006 after being closed for two years due to increased volcanic activity. Photo by JUSTIN GRIGG/Missoulian ...

Every ecosystem is complex and unique. In some places, specific plants, animals, fungi, or bacteria will have a dramatic effect on how the other things in the area will live. Most of the time, if one ...

Sunday marks 45 years since Mount St. Helens erupted in Washington state. The deadly eruption happened shortly after 8:30 a.m. on May 18, 1980, following months of small explosions and earthquakes.

A panoramic view of the south rim of Mount St. Helens, looking past the lava dome north toward Spirit Lake and Mount Rainier. Dean J. Koepfler The public is still able to visit multiple recreation ...

Mount St. Helens, the largest volcanic eruption in US history, was commemorated this weekend, 45 years after its eruption, which killed 57 people and spewed ash across 11 US states and 5 Canadian ...

Mount St. Helens had a devastating eruption on May 18, 1980, that killed 57 people, destroyed hundreds of homes and cabins, and reshaped the volcanic peak, according to the USGS.

Mount St. Helens erupted 45 years ago, causing the deadliest volcanic disaster in U.S. history. May 18 marks 45 years since Mount St. Helens erupted, devastating 230 square miles and killing 57.