GVP volcano 322020 · no holder yet
Jefferson
Jefferson is a 3,199 m stratovolcano in the United States, last erupted in 950 CE.
- Type
- Stratovolcano (composite landform)
- Summit
- 3,199 m above sea level
- Rock
- Andesite / Basaltic Andesite
- Setting
- Subduction zone, continental, over 25 km
- Last eruption
- 950 CE
- Largest known
- no eruption with a measured size
- Eruptions
- 2 confirmed in the record
- Where
- 44.67°N 121.80°W · United States
- Region
- High Cascades Volcanic Arc, North America Volcanic Regions
- Record
- Global Volcanism Program, volcano 322020
Not a hazard warning. For safety information follow USGS Volcano Hazards Program.