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 |
|---|---|---|---|
| 2 July 1985 | — | 1 | Observations: Reported |
| 28 July 1787 | 10 October 1787 | 1 | Observations: Reported |
| 9 July 1784 | — | 2 | Observations: Reported |
| 2 May 1677 | — | 2 | Observations: Reported |
| 1454 ± 16 years | — | 2 | Observations: Reported |
| 1350 ± 50 years | — | ? | Isotopic: 14C (calibrated) |
| 760 ± 100 years | — | ? | Isotopic: 14C (calibrated) |
| 90 ± 300 years | — | ? | Isotopic: 14C (calibrated) |
| 80 BCE ± 75 years | — | 4 | Isotopic: 14C (calibrated) |
| 310 BCE ± 100 years | — | ? | Isotopic: 14C (calibrated) |
| 2,230 BCE ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| 3,510 BCE ± 150 years | — | ? | Isotopic: 14C (calibrated) |
| 4,020 BCE ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| 5,390 BCE ± 75 years | — | ? | Isotopic: 14C (calibrated) |
| 7,190 BCE ± 150 years | — | ? | Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#354010)