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 |
|---|---|---|---|
| 7 June 1917 | 16 November 1917 | 3 | Boquerón summit and north flank · Observations: Reported |
| 3 November 1658 | August 1671 | 3 | NW flank (El Playón) · Observations: Reported |
| 1575 | — | 3 | Loma de Grandes Bloques · Observations: Reported |
| c. 1200 | — | 4 | Boquerón · Correlation: Anthropology |
| August 640 ± 30 years | — | 3 | NW flank (Loma Caldera) · Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#343050)