Eruption history
VEI – Volcanic Explosivity Index: 0 = lava outpouring, 4 = like Eyjafjallajökull 2010, 6 = like Pinatubo 1991, 7 = like Tambora 1815. The scale is logarithmic – each step is about 10 times more material.
| Start | End | VEI | Vent and dating |
|---|---|---|---|
| 11 October 1995 | 24 March 1996 | 1 | Hosho lava dome (east flank) · Observations: Reported |
| June 1675 | — | 2 | Observations: Reported |
| 26 January 1662 | — | 2 | Observations: Reported |
| 370 ± 40 years | — | 3 | Kuro-dake · Isotopic: 14C (calibrated) |
| 100 BCE ± 300 years | — | 4 | Komekubo crater · Isotopic: 14C (calibrated) |
| 990 BCE ± 940 years | — | 4 | Komekubo crater · Isotopic: 14C (calibrated) |
| 1,720 BCE ± 300 years | — | ? | Taisen-Minami · Correlation: Tephrochronology |
| 2,440 BCE ± 300 years | — | 4 | Danbaru · Isotopic: 14C (calibrated) |
| 3,110 BCE ± 500 years | — | ? | Iwaigo-dake, Ogigahana, Hizengajo · Correlation: Tephrochronology |
| 3,780 BCE ± 500 years | — | 4 | Taisen-Hokubu lava dome · Isotopic: 14C (calibrated) |
| 4,490 BCE ± 500 years | — | ? | Tachi-san, Gakurokuji · Correlation: Tephrochronology |
| 7,180 BCE ± 2,640 years | — | ? | Sensui-zan · Correlation: Tephrochronology |
| 9,160 BCE ± 1,190 years | — | 4 | Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#282120)