Cascades Volcano Observatory

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Date published: July 27, 2017

Reporters: Join as GeoGirls Dig Geology at Mount St. Helens

MEDIA ADVISORY

Twenty-five middle-school girls from 11 cities in Washington and Oregon are participating in the third annual “GeoGirls” outdoor volcano science program at Mount St. Helens, jointly organized by the U.S. Geological Survey and the Mount St. Helens Institute.

Date published: May 18, 2017

Ever Vigilant: USGS Marks the 37th Anniversary of Mount St. Helen's Eruption and the 35th Anniversary of the Cascades Volcano Observatory

Today, in 1980, Mount St. Helens unleashed the most devastating eruption in U.S. history. Two years later, USGS founded the Cascades Volcano Observatory to monitor Mount St. Helens and all the Cascades Volcanoes.

Date published: May 5, 2017

Deja Vu: Small Earthquake Swarm at Mount St. Helens Does Not Indicate Future Eruptive Activity

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

Date published: May 1, 2017

May is Volcano Preparedness Month in Washington State

May is Volcano Preparedness Month in Washington, providing residents an opportunity to become more familiar with volcano hazards in their communities and learn about steps they can take to reduce potential impacts.

Date published: January 31, 2017

The Impact of the 1912 Novarupta/Katmai Eruption on the Pacific Northwest

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 explosively erupted during 60 hours beginning on June 6th. There are many historic reports of ashfall from the eruption in the Pacific Northwest.

Date published: December 12, 2016

Small magnitude earthquake swarms detected beneath Mount St. Helens.

The current pattern of seismicity is similar to swarms most recently seen at Mount St. Helens in March-May 2016, and in 2014 and 2013. 

Date published: November 9, 2016

Opportunity to Interview USGS Volcano Disaster Assistance Program Scientists

On November 14, 2016, the news media are invited to visit CVO and interview VDAP scientists about their work assisting foreign counterparts—responding to volcano eruptions and promoting volcano hazard awareness and preparedness.

Date published: November 4, 2016

Imagery Reveals More Landslides in Western Columbia Gorge

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

Date published: August 4, 2016

GeoGirls Dig Geology at Mount St. Helens

MEDIA ADVISORY

Twenty middle-school girls from Washington and Oregon are participating in the second annual “GeoGirls” outdoor volcano science program at Mount St. Helens, jointly organized by the U.S. Geological Survey and the Mount St. Helens Institute.

Date published: May 16, 2016

Recent Mount Hood earthquake swarm typical for this Oregon volcano.

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-existing regional faults and are best thought of as "tectonic" earthquakes rather than earthquakes directly linked to magmatic processes.

Date published: May 12, 2016

May is Volcano Preparedness Month in Washington State

May is Volcano Preparedness Month in Washington, providing residents an opportunity to become more familiar with volcanic hazards in their communities and learn about steps they can take to reduce potential impacts.

Date published: May 5, 2016

Small magnitude earthquake swarm continues at Mount St. Helens.

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