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 |
|---|---|---|---|
| 1060 ± 100 years | — | 3 | Nejapa maar · Correlation: Tephrochronology |
| 550 BCE ± 500 years | — | ? | Correlation: Tephrochronology |
| 3,050 BCE ± 500 years | — | ? | Correlation: Tephrochronology |
| 4,390 BCE ± 100 years | — | ? | El Hormigón · Isotopic: 14C (uncalibrated) |
| 5,230 BCE ± 200 years | — | ? | Isotopic: 14C (uncalibrated) |
| 5,350 BCE ± 200 years | — | ? | Isotopic: 14C (uncalibrated) |
| 7,300 BCE ± 3,150 years | — | ? | Correlation: Tephrochronology |
| 7,430 BCE ± 300 years | — | ? | Refinería crater · Isotopic: 14C (uncalibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#344092)