GVP volcano 322070 · no holder yet
Three Sisters
Three Sisters is a 3,159 m volcanic complex in the United States, last erupted in 439 CE.
- Type
- Complex (composite landform)
- Summit
- 3,159 m above sea level
- Rock
- Andesite / Basaltic Andesite
- Setting
- Subduction zone, continental, over 25 km
- Last eruption
- 439 CE
- Largest known
- VEI 4, cataclysmic, 350 BCE
- Eruptions
- 6 confirmed in the record
- Where
- 44.13°N 121.77°W · United States
- Region
- High Cascades Volcanic Arc, North America Volcanic Regions
- Record
- Global Volcanism Program, volcano 322070
Not a hazard warning. For safety information follow USGS Volcano Hazards Program.