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 |
|---|---|---|---|
| 28 March 1907 | — | 5 | Stubel · Observations: Reported |
| c. 1750 | — | 4 | Stubel · Isotopic: 14C (calibrated) |
| 1000 ± 50 years | — | 4 | Stubel · Isotopic: 14C (calibrated) |
| c. 700 | — | ? | Correlation: Tephrochronology |
| c. 350 | — | 2 | Stubel · Isotopic: 14C (calibrated) |
| 240 ± 100 years | — | 6 | Ksudach V caldera · Isotopic: 14C (calibrated) |
| c. 200 BCE | — | 3 | Correlation: Tephrochronology |
| c. 3,000 BCE | — | 4 | Correlation: Tephrochronology |
| c. 4,100 BCE | — | 3 | Correlation: Tephrochronology |
| c. 4,550 BCE | — | 3 | Correlation: Tephrochronology |
| c. 4,750 BCE | — | ? | SW part of caldera IV (Paryashchiy Utes) · Correlation: Tephrochronology |
| c. 4,900 BCE | — | 5 | Ksudach IV caldera · Isotopic: 14C (calibrated) |
| c. 5,200 BCE | — | 5 | Ksudach IV caldera · Isotopic: 14C (calibrated) |
| c. 5,600 BCE | — | ? | Isotopic: 14C (calibrated) |
| c. 7,900 BCE | — | 5 | Ksudach III caldera · Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#300050)