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 |
|---|---|---|---|
| 500 BCE ± 50 years | — | ? | Between East and Central Mageik · Isotopic: 14C (uncalibrated) |
| c. 550 BCE | — | ? | East Mageik · Isotopic: 14C (uncalibrated) |
| c. 650 BCE | — | ? | East Mageik · Isotopic: 14C (uncalibrated) |
| c. 1,650 BCE | — | ? | East Mageik · Isotopic: 14C (uncalibrated) |
| 1,950 BCE ± 100 years | — | ? | East Mageik · Isotopic: 14C (uncalibrated) |
| 4,400 BCE ± 300 years | — | ? | East Mageik · Isotopic: 14C (uncalibrated) |
| 7,380 BCE ± 150 years | — | ? | East Mageik · Isotopic: 14C (calibrated) |
| 8,670 BCE ± 300 years | — | ? | East Mageik · Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#312150)