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 June 2022 | 31 December 2024 | 2 | Observations: Reported |
| 20 October 2016 | 9 November 2021 | 2 | Sredniy Crater (middle part) and Severny Crater (N part) · Observations: Reported |
| 2 July 2010 | 9 July 2010 | 1 | Summit craters · Observations: Reported |
| 11 February 2009 | 13 July 2009 | 1 | Observations: Reported |
| 29 January 2005 | 16 February 2005 | 2 | Observations: Reported |
| 16 January 1991 | 16 January 1991 | 1 | Northern crater · Observations: Reported |
| 2 February 1989 | 15 April 1990 | 2 | Northern crater and upper east flank · Observations: Reported |
| 14 October 1987 | 16 January 1988 | 1 | Northern crater · Observations: Reported |
| 16 February 1969 | 16 February 1969 | 1 | Northern crater · Observations: Reported |
| 16 January 1967 | 16 April 1967 | 1 | Northern crater · Observations: Reported |
| 16 August 1965 | 16 August 1965 | 1 | Middle Crater · Observations: Reported |
| 8 March 1963 | 2 July 1964 | 1 | North wall of east amphitheater · Observations: Reported |
| 4 October 1934 | 15 October 1935 | 2 | Sredniy crater · Observations: Reported |
| 27 September 1859 | — | 2 | Observations: Reported |
| 31 December 1833 | — | 2 | Observations: Reported |
| 1793 | — | 2 | Observations: Reported |
| c. 1670 | — | ? | Isotopic: 14C (uncalibrated) |
| c. 1650 | — | ? | Isotopic: 14C (uncalibrated) |
| c. 1600 | — | ? | Isotopic: 14C (uncalibrated) |
| 390 BCE ± 75 years | — | ? | Isotopic: 14C (uncalibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#290380)