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Ioto: eruption history
Elevation172 m
TypeCaldera
Confirmed eruptions27#15 of 105 in country
Latest eruption2025-09-01
Largest VEI1
Location24.75, 141.29
Eruptions per century (since 1500)
0
0
0
1
15
10
By VEI
26
Eruptions (latest first, up to 60)
| Start | VEI | End | Area |
|---|---|---|---|
| 2025-09-01 | 1 | 2025 | |
| 2023-10-18 | 1 | 2024 | |
| 2022-07-11 | 1 | 2022 | Off SE coast |
| 2021-08-12 | 1 | 2021 | Off SE coast |
| 2020-12-28 | 1 | 2021 | Asodai Sinkhole |
| 2016-08-31 | 1 | 2016 | Asodai Sinkhole |
| 2015-08-07 | 1 | 2015 | Kianohana Beach (N part of the island) |
| 2012-12-01 | 1 | 2013 | Asodai |
| 2012-02-10 | 1 | 2012 | Asodai |
| 2001-09-21 | 1 | 2001 | Off SE coast and Idogahama (NW coast) |
| 1999-09-10 | 1 | 1999 | Asodai area |
| 1994-08-22 | 1 | 1994 | NE side |
| 1982-11-28 | 1 | 1982 | West side (Asodai) |
| 1982-03-09 | 1 | 1982 | NW side (Idogahama beach) |
| 1980-03-13 | 1 | 1980 | Kitanohara |
| 1978-12-11 | 1 | 1978 | West side (Asodai) |
| 1976-01-16 | 1 | – | West side (Asodai) |
| 1969-12-01 | 1 | 1969 | |
| 1969-01-12 | 1 | 1969 | West side (Asodai) |
| 1967-12-23 | 1 | 1967 | West side (Asodai) |
| 1957-03-28 | 1 | 1957 | Chidoriga-hara |
| 1944-12-16 | 1 | – | North and west sides near the coast |
| 1935-07-02 | 1 | – | SW side at Chidoriga-hara |
| 1930-07-02 | 1 | – | NW side near the coast |
| 1922-07-16 | 1 | – | West side (Asodai) |
| 1889-12-31 | 1 | – | Chidoriga-ana |
| 850 BCE | – | – | Motoyama |
Nearby volcanoes
| Volcano | Distance | Eruptions |
|---|---|---|
| Kita-Fukutokutai | 39 km | 1 |
| Fukutoku-Oka-no-Ba | 55 km | 10 |
| Funka Asane | 79 km | 4 |
| Minami-Hiyoshi | 154 km | 1 |
| Kaitoku Seamount | 154 km | 2 |
| Nikko | 214 km | 0 |
| Kaikata Seamount | 216 km | 0 |
| Nishinoshima | 280 km | 7 |
Eruption records from the Smithsonian Global Volcanism Program; older eruptions may be missing. VEI = Volcanic Explosivity Index (0–8). For current alerts, check the official agency.