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 WA, OR, and ID. 


Date published: February 18, 2021

Brief earthquake swarm detected beneath Mount Rainier

While the seismicity represents a temporary uptick in activity, Mount Rainier remains at normal, background levels of activity.

Date published: January 25, 2021

A Geophysicist's Perspective on Mount Hood Monitoring Stations and the Recent Earthquake Swarm

A CVO geophysicist discusses how the monitoring stations installed at Mount Hood in 2020 provide insight into the recent Mount Hood earthquake swarm.

Date published: January 25, 2021

Upcoming Series of Virtual Talks Focuses on Mount St. Helens and Volcano Monitoring

Beginning in February 2021, CVO staff will provide virtual webinars about Mount St. Helens' May 18, 1980 eruption and how the volcano has shaped the study of volcanoes and volcano monitoring, as part of the Whidbey Reads program.

Find a U.S. Volcano