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 |
|---|---|---|---|
| 3 May 2012 | 11 July 2012 | 2 | Pago · Observations: Reported |
| 28 August 2007 | 28 August 2007 | 1 | Pago · Observations: Reported |
| 3 August 2002 | 26 March 2003 | 3 | Pago (summit and NW flank) · Observations: Reported |
| 16 July 1933 | 16 August 1933 | 2 | Pago · Observations: Reported |
| 2 July 1920 ± 2 years | — | 0 | Pago · Observations: Reported |
| 2 July 1911 | 16 May 1918 | 3 | Pago · Observations: Reported |
| c. 2 July 1800 | — | 4 | Correlation: Tephrochronology |
| 1730 ± 25 years | — | ? | Correlation: Tephrochronology |
| c. 1550 | — | 4 | Correlation: Tephrochronology |
| c. 1450 | — | ? | Correlation: Tephrochronology |
| 1050 ± 100 years | — | ? | Correlation: Tephrochronology |
| c. 950 | — | ? | Correlation: Tephrochronology |
| 710 ± 75 years | — | 6 | Isotopic: 14C (uncalibrated) |
| 690 ± 90 years | — | 5 | Isotopic: 14C (calibrated) |
| 310 ± 100 years | — | 5 | Isotopic: 14C (calibrated) |
| 640 BCE ± 300 years | — | ? | Isotopic: 14C (uncalibrated) |
| 1,370 BCE ± 160 years | — | 6 | Isotopic: 14C (calibrated) |
| 4,000 BCE ± 210 years | — | 6 | Isotopic: 14C (calibrated) |
| 7,510 BCE ± 150 years | — | ? | Witori · Isotopic: 14C (uncalibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#252080)