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 |
|---|---|---|---|
| 8 June 1874 | — | 1 | Observations: Reported |
| 18 November 1846 | — | 1 | Observations: Reported |
| c. 1350 | — | ? | NW E-san · Correlation: Tephrochronology |
| 440 BCE ± 46 years | — | ? | Isotopic: 14C (calibrated) |
| c. 1,050 BCE | — | ? | NW E-san · Correlation: Tephrochronology |
| 3,900 BCE ± 100 years | — | ? | NW E-san · Isotopic: 14C (calibrated) |
| 5,770 BCE ± 924 years | — | 0 | East flank (Misaka lava dome) · Isotopic: 14C (calibrated) |
| 6,670 BCE ± 27 years | — | 3 | Esan lava dome · Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#285011)