The U.S. Geological Survey Cascades Volcano Observatory said the swarm began early Tuesday at the 14,410-foot volcano near ...

More than 300 earthquakes have erupted at Washington's Mount Rainier this week, the largest earthquake swarm at the volcano ...

The U.S. Geological Survey said it and other agencies were monitoring the situation and would issue additional alerts "as needed." ...

Mount Baker is a “glaciated volcano” in the North Cascades mountain range, according to the Washington Trails Association.

Where is Mount St. Helens? Mount St. Helens is in Skamania County, Washington. The volcano formed through four eruptive events starting about 275,000 years ago, according to the USGS.

The 1980 eruption cycle made Mount St. Helens one of the most famous volcanoes in the Cascades. But it is far from the only volcano in the range.

It's been 45 years since the Mount St. Helens eruption in Washington state. British Columbians who were young adults at the time remember how the sky changed as the volcanic ash arrived.

Sunday marks the anniversary of the May 18, 1980, volcanic eruption that rocked the Northwest. Geologist Carolyn Driedger recounts the haunting day before that catastrophic event — and its ...

The 45th anniversary of the catastrophic eruption of Mount St. Helens is on May 18. Here's what to know and when the volcano might erupt again.