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 |
|---|---|---|---|
| 26 October 1961 | 5 December 1961 | 2 | North of Öskjuvatn lake (Vikraborgir) · Observations: Reported |
| 19 December 1938 | — | 2 | South shore of Öskjuvatn lake · Observations: Reported |
| 15 July 1926 | — | 2 | South end of Öskjuvatn lake · Observations: Reported |
| c. 2 July 1924 | — | 0 | South flank of Dyngjufjöll massif · Observations: Reported |
| 15 January 1923 | — | 0 | SE corner of Öskjuvatn Caldera · Observations: Reported |
| 16 November 1922 | — | 0 | 1 km SW of Öskjuvatn Caldera · Observations: Reported |
| 16 March 1921 | — | 0 | NE caldera wall, 0.6 km SE of Viti · Observations: Reported |
| 2 July 1919 | — | 2 | Dyngjufjöll · Observations: Reported |
| 1 January 1875 | 17 October 1875 | 5 | Öskjuvatn Caldera, Viti, Sveinagja · Observations: Reported |
| c. 1797 | — | 0 | Holuhraun · Observations: Reported |
| c. 1300 | — | 1 | South of Dyngjufjöll Ytri · Correlation: Tephrochronology |
| 1,250 BCE ± 300 years | — | 0 | Litladynga and Askja · Correlation: Tephrochronology |
| 2,050 BCE ± 500 years | — | 0 | Flatadyngja, other areas NE of Dyngjufjöll · Correlation: Tephrochronology |
| 8,910 BCE ± 200 years | — | 5 | SE part of Askja caldera · Isotopic: 14C (calibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#373060)