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: June 5, 2021

M3.9 earthquake and swarm occur at Mount Hood on June 5, 2021

The M 3.9 earthquake occurred at a depth of 2.7 miles below sea level. At this time, seismologists do not believe the earthquake swarm signifies a change in volcanic hazard at Mount Hood, and will continue to monitor the swarm and issue updates as the situation warrants.

Date published: June 2, 2021

Opportunity to Comment on Mount Rainier Lahar Detection and Seismic Monitoring System

Expansion of the lahar detection system at Mount Rainier will improve the Cascades Volcano Observatory's overall volcano monitoring and lahar detection capacity and provide more rapid notification to the immediate area and surrounding communities.  

Date published: June 2, 2021

Status of (mostly) Washington's Volcanoes: Report to Emergency Managers 2020-2021

While most of the Cascade Range volcanoes are located in remote areas, volcanic processes like ashfall and lahars can put large populations at risk. Frequent communication and interactions among scientists and emergency managers will help prepare us for future hazards.

Find a U.S. Volcano