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 |
|---|---|---|---|
| c. 1550 | — | ? | East flank of Savich (Krab cone) · Correlation: Tephrochronology |
| c. 1350 | — | 4 | Savich cone and north flank · Isotopic: 14C (uncalibrated) |
| 900 ± 50 years | — | 3 | Savich cone · Isotopic: 14C (uncalibrated) |
| 830 ± 25 years | — | ? | Savich cone · Correlation: Tephrochronology |
| c. 650 | — | ? | Savich cone · Isotopic: 14C (uncalibrated) |
| c. 550 | — | 3 | East side of Zapadny, Savich cone · Isotopic: 14C (calibrated) |
| 2,780 BCE ± 25 years | — | 4 | Zapadny · Isotopic: 14C (calibrated) |
| c. 2,850 BCE | — | 3 | Zapadny · Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#300180)