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 |
|---|---|---|---|
| 17 August 1989 | 17 August 1989 | 1 | Observations: Reported |
| 30 August 1987 | 4 September 1987 | 1 | N crater rim, E flank · Observations: Reported |
| 15 January 1982 | 15 January 1982 | 3 | Observations: Reported |
| 7 August 1980 | 17 September 1980 | 3 | Observations: Reported |
| 17 January 1952 | — | 2 | Observations: Reported |
| 2 July 1950 | 2 July 1951 | 1 | Observations: Reported |
| 16 April 1929 | 2 July 1930 | 3 | SE flank fissure (near summit to sea) · Observations: Reported |
| 2 July 1922 | — | 3 | Observations: Reported |
| 2 July 1873 | — | 2 | Observations: Reported |
| 1792 | — | 2 | Observations: Reported |
| 1791 | — | 2 | Observations: Reported |
| 1790 | — | 2 | Observations: Reported |
Data: Global Volcanism Program, Smithsonian Institution (#311070)