News

Swarms common in the vicinity of Mount Hood.

Thirty-seven years after the May 18, 1980, eruption of Mount St. Helens, Washington, scientists, engineers, land managers, and Federal, State, and...

Each swarm provides seismologists with more perspective on the personality of the volcano and aids in our ability to assess hazards in the future.

Scientists learn more about conditions in the shallow subsurface at this active volcano.

Join volcano scientists from around the world during scientific meeting and associated public event in Portland.

MEDIA ADVISORY

Twenty-five middle-school girls from 11 cities in Washington and Oregon are participating in the third annual “GeoGirls” outdoor volcano...

Today, in 1980, Mount St. Helens unleashed the most devastating eruption in U.S. history. Two years later, USGS founded the Cascades Volcano...

As of May 5, the PNSN has located 47 earthquakes near Mount St. Helens since the seismic network was restored on April 21, 2017.

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

The world's largest eruption of the 20th century occurred in 1912 at Novarupta on the Alaska Peninsula. An estimated 15 cubic kilometers of magma was...