News

New mapping in the western portion of the Columbia Gorge in Skamania County, Washington, shows previously unrecognized landslides beneath dense forest...

MEDIA ADVISORY

Twenty middle-school girls from Washington and Oregon are participating in the second annual “GeoGirls” outdoor volcano science program...

At Mount Hood, a swarm of small earthquakes was detected May 15-16, 2016. Studies of past swarms have concluded that they likely are occurring on pre...

May is Volcano Preparedness Month in Washington, providing residents an opportunity to become more familiar with volcanic hazards in their communities...

The earthquakes are volcano-tectonic in nature, indicative of a slip on a small fault. Such events are commonly seen in active hydrothermal and...

The largest earthquake was a Magnitude 0.7, an event that would not be felt even if you were standing on the surface above it.

This area also experienced periods of elevated seismicity in June-August 2001 and July-August 2012.

The eroded sediments are volcanic deposits on the south-southwest side of the volcano.

Scientists, civil authorities, and emergency managers from Chile and the U.S. met in California to discuss the challenges of effective volcanic hazard...

USGS-Cascades Volcano Observatory geologists working in the area on August 21 observed higher sediment-laden stream flows and broad areas adjacent to...