What the records say
- When
- 950
- Kind
- Volcanic eruption
- Coordinates
- 44.67° N, 121.80° W
- Date uncertainty
- year uncertain
- Vent
- S of Jefferson (South Cinder Peak)
- Dated by
- Sidereal: Varve Count
- Volcano number
- 322020
- Eruption number
- 20578
Mount Jefferson (Oregon)
Stratovolcano in the Cascade Range, Oregon, US
Mount Jefferson is a stratovolcano in the Cascade Volcanic Arc, part of the Cascade Range in the U.S. state of Oregon. The second highest mountain in Oregon, it is situated within Linn County, Jefferson County, and Marion County and forms part of the Mount Jefferson Wilderness. Due to the ruggedness of its surroundings, the mountain is one of the hardest volcanoes to reach in the Cascades.
From Wikipedia, CC BY-SA · Read the article
The source
- Smithsonian GVP Volcanoes of the World: Holocene eruptionsGlobal Volcanism Program, Smithsonian InstitutionSmithsonian terms of use: personal, educational and non-commercial use, with creditGlobal Volcanism Program, Smithsonian Institution: Volcanoes of the World v5.3, https://doi.org/10.5479/si.GVP.VOTW5-2025.5.3Source page