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 |
|---|---|---|---|
| 16 March 1991 | — | 1 | Anak Ranakah · Observations: Reported |
| 28 December 1987 | 16 April 1989 | 3 | Anak Ranakah · Observations: Reported |
Data: Global Volcanism Program, Smithsonian Institution (#264071)