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 |
|---|---|---|---|
| 18 December 2023 | 18 December 2023 | 1 | Observations: Seismicity |
| 18 February 2012 | 18 February 2012 | 2 | E-W fissure at summit crater · Observations: Reported |
| 19 June 1995 | 23 June 1995 | 2 | Observations: Reported |
| 5 January 1994 | 26 November 1994 | 2 | Observations: Reported |
| 2 July 1942 | — | 1 | Observations: Reported |
| 16 May 1906 | — | ? | Summit, upper SW flank · Observations: Reported |
| 2 July 1904 | — | 0 | Upper south flank ? · Observations: Reported |
| c. 1783 | 1787 | ? | Observations: Reported |
| 1400 ± 50 years | — | ? | Isotopic: 14C (calibrated) |
| 1150 ± 100 years | — | ? | Isotopic: 14C (calibrated) |
| 850 ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| 200 ± 150 years | — | ? | Isotopic: 14C (calibrated) |
| 1,550 BCE ± 100 years | — | ? | Isotopic: 14C (calibrated) |
| 1,900 BCE ± 300 years | — | ? | Isotopic: 14C (calibrated) |
| 2,150 BCE ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| 2,300 BCE ± 150 years | — | ? | Isotopic: 14C (calibrated) |
| 4,700 BCE ± 150 years | — | ? | Isotopic: 14C (calibrated) |
| 7,300 BCE ± 500 years | — | ? | Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#311110)