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Chokaisan: eruption history
Elevation2,236 m
TypeStratovolcano
Confirmed eruptions14#29 of 105 in country
Latest eruption1974-03-01
Largest VEI2
Location39.10, 140.05
Eruptions per century (since 1500)
0
1
1
3
1
0
By VEI
1
1
5
Eruptions (latest first, up to 60)
| Start | VEI | End | Area |
|---|---|---|---|
| 1974-03-01 | 1 | 1974 | E side of Shinzan, W of Kojin-yama |
| 1834-07-09 | 2 | 1834 | |
| 1821-05-23 | 2 | – | Near Shinzan and Shichiko-zan |
| 1800-12-16 | 2 | 1804 | Shinzan (foot of Kojin-yama) |
| 1740-06 | 2 | 1747 | Small crater at foot of Kojin-yama |
| 1659-04 | – | 1663 | |
| 939-05-15 | – | – | |
| 871-05-05 | 2 | – | |
| 830-01 | – | – | |
| 817 | – | – | |
| 711 | – | – | |
| 450 BCE | – | – | |
| 650 BCE | – | – | Higashi-Chokai |
| 1050 BCE | 0 | – | West flank (Saruana crater) |
Nearby volcanoes
| Volcano | Distance | Eruptions |
|---|---|---|
| Hijiori | 56 km | 0 |
| Kurikomayama | 66 km | 7 |
| Naruko | 72 km | 5 |
| Akita-Komagatake | 98 km | 18 |
| Megata | 99 km | 2 |
| Zaozan [Zaosan] | 112 km | 43 |
| Akita-Yakeyama | 114 km | 16 |
| Iwatesan | 117 km | 26 |
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.