The sediment retention dam in Toutle has become less and less effective as it fills, switching from catching about 80% of ...

Increasing volcanic activity at the over 11,000-foot-tall, snowcapped volcano in Alaska is likely a sign of its impending first eruption since 1992, experts say. Mount Spurr, located about 75 miles ...

Alaska's Mount Spurr, an active volcano near the most populated region in the state, is getting even closer to an eruption, ...

The Alaska Volcano Observatory on Wednesday said Mount Spurr is at risk of erupting within the next few weeks or months, potentially impacting residents 78 miles away in the city of Anchorage.

The Alaska Volcano Observatory said signs indicated a Mount Spurr eruption was likely, though not certain, in the weeks or ...

A volcano near Alaska’s largest city is showing new signs of unrest, with experts saying the likelihood of an eruption at Mount Spurr in the next few weeks or months has increased ...

Mount Adams, Washington state's largest active volcano, is witnessing a surge in seismic activity. The seismic activity has ...

In a remote corner of the U.S., active volcanoes wait patiently above the ridgelines, leaving residents on edge.