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 |
|---|---|---|---|
| 12 January 1979 | 9 August 1979 | 2 | SE foot of Bagiai · Observations: Reported |
| 30 December 1974 | 26 June 1975 | 2 | Bagiai · Observations: Reported |
| 14 February 1974 | 8 August 1974 | 2 | Bagiai · Observations: Reported |
| 17 June 1895 | 16 August 1895 | 2 | Observations: Reported |
| 2 July 1885 | — | 2 | Observations: Reported |
| 20 April 1643 | — | 3 | Observations: Reported |
| 1070 ± 200 years | — | ? | South flank (Patilo Cone) · Isotopic: 14C (uncalibrated) |
| c. 730 | — | 4 | Isotopic: 14C (uncalibrated) |
| 520 ± 100 years | — | 4 | Isotopic: 14C (uncalibrated) |
| 870 BCE ± 75 years | — | ? | Isotopic: 14C (uncalibrated) |
| 7,140 BCE ± 150 years | — | 4 | Isotopic: 14C (uncalibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#251030)