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 |
|---|---|---|---|
| 5 July 1986 | 14 July 1986 | 1 | Observations: Reported |
| 2 July 1970 | — | 2 | Observations: Reported |
| 20 May 1917 | 20 May 1917 | 2 | Observations: Reported |
| 4 January 1893 | 4 January 1893 | 2 | East flank (Sibanggor Julu) · Observations: Reported |
| 21 May 1892 | — | 2 | Summit and east flank (Jurang Siunik) · Observations: Reported |
| 2 July 1879 | — | 2 | Observations: Reported |
| c. 2 July 1829 | — | 2 | Observations: Reported |
Data: Global Volcanism Program, Smithsonian Institution (#261120)