Cascades Volcano Observatory
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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.
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Earthquakes occur in Mount Rainier's hydrothermal system.
While the seismicity represents a temporary uptick in activity, Mount Rainier remains at normal, background levels of activity.
Field guides provide history and context for your next field trip to Mount St. Helens
Exposures in valleys surrounding Mount St. Helens reveal records of diverse geologic processes including debris avalanche, lahar, huge water wave on a nearby lake, pyroclastic density currents (surge and flow), tephra fall, lava flow, growth of domes, and past glaciation.
USGS to Install New Volcano Early Detection and Monitoring Stations at Mount Hood--Improving Early Detection of Unrest at this Active Volcano
New sensor network will help safeguard lives and property, and because of the relatively small footprint, there will be very little disturbance to the environment and wildlife in the area.