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Nov 5, 2023 · Mount Shasta erupts episodically with ten or more eruptions occurring in short (500-2,000 year) time periods separated by long intervals (3,000-5,000 years) with few or no eruptions. Evidence suggests that magma most recently erupted at the surface about 3,200 years ago. Sources/Usage: Public Domain. View Media Details.
Over time, an ancestral Mount Shasta stratovolcano was built to a large but unknown height; sometime between 300,000 and 360,000 years ago the entire north side of the volcano collapsed, creating an enormous landslide or debris avalanche, 6.5 cu mi (27 km 3) in volume.
Mount Shasta erupts episodically with ten or more eruptions occurring in short (500-2,000 year) time periods separated by long intervals (3,000-5,000 years) with few or no eruptions. Evidence suggests that magma most recently erupted at the surface about 3,200 years ago.
Aug 20, 2019 · August 20, 2019. 4 min read. California’s Mount Shasta Loses a Historical Eruption. Clues from an old map erase a false 1786 event and are part of a global volcanic-record cleanup. By...
- Jennifer Leman
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May 4, 2024 · Its last recorded eruption occurred in 1786; the area remains tectonically active, and earthquakes are relatively common. Mount Shasta has steam vents and several glaciers that feed the McCloud, Sacramento, and Shasta rivers, and its slopes are popular with skiers and climbers
General Information. Eruptive History. Deformation History. Emission History. Photo Gallery. Map Holdings. Sample Collection. External Sites. Most Recent Bulletin Report: June 1992 (BGVN 17:06) Cite this Report. No seismicity triggered by M 7.5 earthquake hundreds of kilometers away.
