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Around 1250 AD
- Smithsonian Institution 's Global Volcanism Program says that the 1786 eruption is discredited, and that the last known eruption of Mount Shasta was around 1250 AD, proved by uncorrected radiocarbon dating.
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Nov 5, 2023 · Eruptions during the last 10,000 years produced lava flows and domes on and around the flanks of Mount Shasta, and pyroclastic flows from summit and flank vents extended as far as 20 km (12.4 mi) from the summit. Most of these eruptions also produced large mudflows, many of which reached more than several tens of kilometers from Mount Shasta.
- Mount Shasta
The record of eruptions over the last 10,000 years suggests...
- How often does Mount Shasta erupt?
Mount Shasta doesn’t erupt on a regular timescale. Research...
- Mount Shasta
A historic eruption of Mount Shasta in 1786 may have been observed by Lapérouse, but this is disputed. Smithsonian Institution's Global Volcanism Program says that the 1786 eruption is discredited, and that the last known eruption of Mount Shasta was around 1250 AD, proved by uncorrected radiocarbon dating.
The record of eruptions over the last 10,000 years suggests that, on average, at least one eruption occurs every 800 to 600 years at Mt Shasta. USGS and UNAVCO seismic and geodetic networks provide real-time volcano monitoring data.
Mount Shasta doesn’t erupt on a regular timescale. Research indicates that the volcano 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.
May 19, 2024 · The last confirmed eruption of Mt Shasta happened in 1786 and was observed by the exporer La Pérouse from his ship. 20 km. 10 mi. + −. Leaflet | © Esri — Sources: GEBCO, NOAA, CHS, OSU, UNH, CSUMB, National Geographic, DeLorme, NAVTEQ, and Esri. [ smaller] [ larger] Mount Shasta webcams / live data | News/Updates | Earthquakes | Images.
Shasta. Google Earth Placemark with Features. Cite Volcano Profile. United States. Composite (Stratovolcano) 1250 CE. Country. Landform (Volc Type) Last Known Eruption. 41.409°N. 122.193°W. 4317 m. 14163 ft. 323010. Latitude. Longitude. Summit. Elevation. Volcano. Number. © 2024 TomTom, © 2024 Microsoft Corporation. Terms. Latest Activity Reports.
The last significant eruption on Shasta may have occurred two hundred years ago. Mount Shasta can release volcanic ash, pyroclastic flows or dacite and andesite lava. Its deposits can be detected under nearby small towns totaling 20,000 in population. Shasta has an explosive, eruptive history.
