GVP volcano 311060 · no holder yet
Semisopochnoi
Semisopochnoi is a 1,221 m stratovolcano in the United States, erupting as recently as 2023.
- Type
- Stratovolcano (composite landform)
- Summit
- 1,221 m above sea level
- Rock
- Basalt / Picro-Basalt
- Setting
- Subduction zone, intermediate, 15–25 km
- Last eruption
- 2023
- Largest known
- VEI 2, explosive, 2021
- Eruptions
- 6 confirmed in the record
- Where
- 51.93°N 179.58°E · United States
- Region
- Aleutian Ridge Volcanic Arc, North America Volcanic Regions
- Record
- Global Volcanism Program, volcano 311060
Not a hazard warning. For safety information follow USGS Volcano Hazards Program.