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 |
|---|---|---|---|
| 5 June 1926 | — | 0 | Reykjaneshryggur (NE of Eldey) · Observations: Reported |
| 30 May 1879 | 15 June 1879 | 1 | Reykjaneshryggur (Geirfugladrangur) · Observations: Reported |
| 1422 | — | 2 | Reykjaneshryggur (Geirfuglasker-Eldey area) · Observations: Reported |
| c. 1340 | — | 3 | Reykjaneshryggur · Observations: Reported |
| 31 August 1211 | — | 4 | Reykjaneshryggur · Observations: Reported |
Data: Global Volcanism Program, Smithsonian Institution (#371022)