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Large snow-covered, cone shaped mountain in background, looming over suburban area in foreground

Cascades Volcano Observatory

The U.S. Geological Survey's Cascades Volcano Observatory strives to serve the national interest by helping people to live knowledgeably and safely with volcanoes in Washington, Oregon, and Idaho.

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Cascades Volcano Observatory

The U.S. Geological Survey's Cascades Volcano Observatory strives to serve the national interest by helping people to live knowledgeably and safely with volcanoes in Washington, Oregon, and Idaho.

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Explore Search: CVO

Cascades Volcano Observatory

Cascades Volcano Observatory

Cascades Volcano Observatory

Cascades Volcano Observatory

A screenshot of an algorithm that David George is working on at CVO

A screenshot of an algorithm that David George is working on at CVO

CVO Seismologist Wes Thelen pointing out a small earthquake at Mount Adams.

CVO Seismologist admires the view from atop a monitoring station after adjusting the solar panels.

CVO is having an Open House!

Get to know CVO: Wes and the CVO Seismic Network

Get to know CVO: Maciej Obryk and the USGS debris-flow flume

Research Scientist Emily Johnson calibrates the FTIR in the CVO Petrology Lab

Research Scientist Emily Johnson calibrates the FTIR in the CVO Petrology Lab

Cascades Volcano Observatory (CVO) staff in front of the CVO office...

USGS-CVO building sign, Vancouver, WA.

CVO Mobile Telemetry Trailer

CVO Open House

Get to know CVO: Alex and Infrasound

Get to know CVO: David and D-Claw

The CVO Sediment Laboratory works closely with scientist in providi...

CVO Monitoring Program: Keeping an Eye on Cascade Volcanoes

USGS CVO staff member assisting a teacher with mineral identificati...

Get to know CVO: Erin Lysne, VALT and… the ghost of VALT?

Educators hiking at Mount Rainier with CVO and NPS staff during a t...

USGS CVO scientist answers media inquiries relating to increase in ...

USGS-CVO staff advises officials and emergency managers about Mount...

Update on recent seismic activity at Mount Adams (Sep - Nov 2024)

Scientists monitor data in the CVO operations room

USGS campus in Menlo Park, CA - office location of the CVO

CVO dismantles Mount St. Helens’ VALT seismic station after 18 years in service.

CVO geophysicist installs a GPS mast at station LSON, Mount Hood

CVO Scientists Develop Innovative Tools for Improved Volcano Monitoring

Opportunities for Educators to Engage with CVO

Scientists in CVO petrology lab point out how thin sections are use...