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 July 1884 | — | 1 | SE caldera wall · Observations: Reported |
| c. 1769 | — | ? | Center of caldera bay · Observations: Reported |
| 1710 ± 10 years | — | 1 | SE caldera wall · Observations: Reported |
| 7,450 BCE ± 50 years | — | 4 | Isotopic: 14C (uncalibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#290210)