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 |
|---|---|---|---|
| 4 March 867 | 4 May 867 | 3 | Observations: Reported |
| 771 | — | 0 | Observations: Reported |
| 200 BCE ± 50 years | — | 4 | Yufu-dake summit and N flank (Ikeshiro) · Isotopic: 14C (uncalibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#282130)