Historia erupcji
VEI – wskaźnik eksplozywności wulkanicznej: 0 = wylew lawy, 4 = jak Eyjafjallajökull 2010, 6 = jak Pinatubo 1991, 7 = jak Tambora 1815. Skala jest logarytmiczna – każdy stopień to ok. 10 razy więcej materiału.
| Początek | Koniec | VEI | Miejsce i datowanie |
|---|---|---|---|
| 690 ± 100 lat | — | 4 | S caldera wall · Isotopic: 14C (calibrated) |
| 490 ± 100 lat | — | 4 | South caldera wall · Isotopic: 14C (calibrated) |
| ok. 1 450 p.n.e. | — | ? | South of East Lake · Chem/Bio: Hydration Rind |
| ok. 4 450 p.n.e. | — | ? | Center, N & S caldera, upper SE flank · Chem/Bio: Hydration Rind |
| 4 690 p.n.e. ± 150 lat | — | 0 | NW rift zone · Isotopic: 14C (calibrated) |
| 4 770 p.n.e. ± 75 lat | — | ? | NW rift zone (Sugarpine Butte) · Isotopic: 14C (calibrated) |
| 4 860 p.n.e. ± 150 lat | — | 0 | NW rift zone · Isotopic: 14C (calibrated) |
| 4 960 p.n.e. ± 100 lat | — | ? | East Lake fissure, south flank · Isotopic: 14C (calibrated) |
| 5 070 p.n.e. ± 150 lat | — | 3 | Lower NW rift zone (Lava Butte) · Isotopic: 14C (calibrated) |
| 5 260 p.n.e. ± 150 lat | — | 0 | NW rift zone (Lava Cast Forest) · Isotopic: 14C (calibrated) |
| 9 210 p.n.e. ± 1 200 lat | — | ? | South and east caldera rim · Isotopic: 14C (calibrated) |
Dane: Global Volcanism Program, Smithsonian Institution (#322110)