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 |
|---|---|---|---|
| 15 lipca 1919 | 15 lipca 1919 | 1 | W side of Onigajo caldera (O-jigokudani) · Observations: Reported |
| 22 stycznia 1732 | październik 1732 | 2 | NE flank of Yakushi-dake · Observations: Reported |
| 26 marca 1686 | 27 marca 1686 | 3 | Observations: Reported |
| 1450 ± 100 lat | — | ? | Nishi-Iwate and Higashi-Iwate · Isotopic: 14C (uncalibrated) |
| 1300 ± 50 lat | — | 3 | Higashi-Iwate (Myoko-dake) · Correlation: Tephrochronology |
| ok. 150 | — | ? | Higashi-Iwate · Isotopic: 14C (uncalibrated) |
| ok. 350 p.n.e. | — | ? | Higashi-Iwate · Isotopic: 14C (uncalibrated) |
| ok. 450 p.n.e. | — | ? | Nishi-Iwate (O-jigokudani area) · Isotopic: 14C (calibrated) |
| ok. 1 150 p.n.e. | — | ? | Nishi-Iwate · Isotopic: 14C (uncalibrated) |
| ok. 1 250 p.n.e. | — | 3 | Higashi-Iwate · Isotopic: 14C (calibrated) |
| 1 500 p.n.e. ± 300 lat | — | ? | Higashi-Iwate · Correlation: Tephrochronology |
| ok. 1 650 p.n.e. | — | ? | Nishi-Iwate (O-jigokudani area) · Isotopic: 14C (calibrated) |
| ok. 2 000 p.n.e. | — | ? | Nishi-yama · Isotopic: 14C (calibrated) |
| 2 050 p.n.e. ± 200 lat | — | ? | Higashi-Iwate · Isotopic: 14C (calibrated) |
| 2 700 p.n.e. ± 200 lat | — | ? | Higashi-Iwate · Correlation: Tephrochronology |
| 2 950 p.n.e. ± 50 lat | — | ? | Nishi-Iwate · Isotopic: 14C (calibrated) |
| ok. 3 050 p.n.e. | — | ? | Higashi-Iwate · Isotopic: 14C (uncalibrated) |
| 3 250 p.n.e. ± 500 lat | — | 0 | Correlation: Tephrochronology |
| 3 750 p.n.e. ± 100 lat | — | ? | Higashi-Iwate · Correlation: Tephrochronology |
| 4 350 p.n.e. ± 500 lat | — | ? | Higashi-Iwate · Correlation: Tephrochronology |
| 4 450 p.n.e. ± 500 lat | — | 0 | Higashi-Iwate · Correlation: Tephrochronology |
| 4 850 p.n.e. ± 50 lat | — | ? | Nishi-Iwate · Isotopic: 14C (calibrated) |
| 4 900 p.n.e. ± 100 lat | — | ? | Higashi-Iwate · Isotopic: 14C (calibrated) |
| 5 650 p.n.e. ± 50 lat | — | ? | Nishi-Iwate · Isotopic: 14C (calibrated) |
| 6 300 p.n.e. ± 100 lat | — | ? | Nishi-Iwate · Isotopic: 14C (calibrated) |
| 6 450 p.n.e. ± 1 600 lat | — | ? | Correlation: Tephrochronology |
Dane: Global Volcanism Program, Smithsonian Institution (#283240)