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 |
|---|---|---|---|
| February 1785 | March 1786 | 2 | Upper SE flank · Observations: Reported |
| c. 1700 | — | ? | Correlation: Tephrochronology |
| c. 1590 | — | ? | North flank of main summit · Correlation: Tephrochronology |
| c. 1570 | — | 4 | North flank of main summit · Correlation: Tephrochronology |
| c. 1440 | — | ? | Correlation: Tephrochronology |
| c. 1290 | — | 4 | Tarugo Corral lava dome (NE flank) · Correlation: Tephrochronology |
| c. 1270 | — | ? | Correlation: Tephrochronology |
| c. 1040 | — | 4 | Lava dome near eastern summit · Correlation: Tephrochronology |
| c. 880 | — | ? | Correlation: Tephrochronology |
| c. 260 | — | ? | Correlation: Tephrochronology |
| c. 200 | — | ? | Correlation: Tephrochronology |
| c. 170 | — | ? | Correlation: Tephrochronology |
| c. 10 | — | ? | Correlation: Tephrochronology |
| c. 180 BCE | — | ? | Correlation: Tephrochronology |
| c. 230 BCE | — | ? | Correlation: Tephrochronology |
| c. 260 BCE | — | ? | Correlation: Tephrochronology |
| c. 460 BCE | — | ? | Correlation: Tephrochronology |
| c. 510 BCE | — | ? | Correlation: Tephrochronology |
| c. 560 BCE | — | ? | Correlation: Tephrochronology |
| c. 1,300 BCE | — | ? | Correlation: Tephrochronology |
| c. 1,650 BCE | — | ? | Correlation: Tephrochronology |
| c. 1,800 BCE | — | ? | Correlation: Tephrochronology |
Data: Global Volcanism Program, Smithsonian Institution (#352006)