GVP volcano 284120 · no holder yet
Ioto
Ioto is a 172 m caldera in Japan, erupting as recently as 2025.
- Type
- Caldera
- Summit
- 172 m above sea level
- Rock
- Trachyandesite / Basaltic Trachyandesite
- Setting
- Subduction zone, thickness unknown
- Last eruption
- 2025
- Largest known
- VEI 1, gentle, 2025
- Eruptions
- 27 confirmed in the record
- Where
- 24.75°N 141.29°E · Japan
- Region
- Ogasawara Volcanic Arc, Northwestern Pacific Volcanic Regions
- Record
- Global Volcanism Program, volcano 284120
Not a hazard warning. For safety information follow the World Organization of Volcano Observatories (its directory lists the observatory for each country).