All volcanoes in the Cascade Range of Oregon and Washington are at normal background activity levels. Current Volcano Alert Level: NORMAL Current Aviation Color Code: GREEN During the past week, small earthquakes were detected at Mount Rainier, Mount St. Helens, and Mount Hood. Field crews were at Mount St. Helens and Mount Rainier to finish installation of new monitoring stations. Last week, CVO staff installed five new stations along the White River, north of Mount Rainier in Washington state.
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All volcanoes in the Cascade Range of Oregon and Washington are at normal background activity levels. Current Volcano Alert Level: NORMAL Current Aviation Color Code:
USGS Volcanoes. . All volcanoes in the Cascade Range of Oregon and Washington are at normal background activity levels. Current Volcano Alert Level: NORMAL Current Aviation Color Code: GREEN During the past week, small earthquakes were detected at Mount Rainier, Mount St. Helens, and Mount Hood. Field crews were at Mount St. Helens and Mount ...
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Mount Rainier Eruption
Update on seismic swarm that began on July 8, 2025, at Mount Rainier, Washington—activity has returned to background levels. (Video shows Rainier’s summit as observed during a helicopter overflight by the CVO gas-monitoring team on August 4, 2025.) Information Statement: https://ow.ly/Cqfr50WLNxY SUMMARY Seismic activity at Mount Rainier has returned to normal background levels following an earthquake swarm that began on July 8, 2025. The Volcano Alert Level and Aviation Color Code for Mount Rai
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Update on seismic swarm that began on July 8, 2025, at Mount Rainier, Washington—activity has returned to background levels. (Video shows Rainier’s summit as observed during a helicopter overflight by the CVO gas-monitoring team on August 4, 2025.) Information Statement: https://ow.ly/Cqfr50WLNxY SUMMARY Seismic activity at Mount Rainier has returned to normal background levels following an earthquake swarm that began on July 8, 2025. The Volcano Alert Level and Aviation Color Code for Mount Rai
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