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 |
|---|---|---|---|
| 23 April 2015 | 24 May 2015 | 0 | NE flank · Observations: Seismicity |
| 6 April 2011 | 12 April 2011 | 0 | E caldera rim to 10 km S · Observations: Reported |
| 25 January 1998 | 5 February 1998 | 0 | South end of Axial caldera · Observations: Reported |
| 1 January 1976 ± 6 years | 1 January 1982 | 0 | Observations: Reported |
| 1650 ± 117 years | — | 0 | East-central caldera floor · Isotopic: 14C (calibrated) |
| 1400 ± 71 years | — | 0 | East caldera rim · Isotopic: 14C (calibrated) |
| 1300 ± 91 years | — | 0 | NW caldera floor · Isotopic: 14C (calibrated) |
| 1260 ± 72 years | — | 0 | NE caldera floor and rim · Isotopic: 14C (calibrated) |
| 1230 ± 76 years | — | 0 | South caldera floor · Isotopic: 14C (calibrated) |
| 1000 ± 98 years | — | ? | West caldera rim · Isotopic: 14C (calibrated) |
| 800 ± 107 years | — | 0 | West caldera rim · Isotopic: 14C (calibrated) |
| 410 ± 123 years | — | 0 | East caldera rim · Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#331021)