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 |
|---|---|---|---|
| 4 September 1984 | 18 September 1984 | 0 | Leirhnjúkur to 8.5 km north · Observations: Reported |
| 18 November 1981 | 23 November 1981 | 0 | Leirhnjúkur to 9 km north · Observations: Reported |
| 30 January 1981 | 4 February 1981 | 0 | 6-8 km N of Leirhnjúkur · Observations: Reported |
| 16 March 1980 | 23 October 1980 | 0 | Leirhnjúkur to 11 km north · Observations: Reported |
| 27 April 1977 | 8 September 1977 | 1 | 3 km north of Leirhnjúkur · Observations: Reported |
| 20 December 1975 | 20 December 1975 | 0 | 1.5-2.5 km north of Leirhnjúkur · Observations: Reported |
| 10 July 1746 | 10 July 1746 | 1 | Leirhnjúkur crater row · Observations: Reported |
| 30 June 1729 | 25 September 1729 | 2 | Leirhnjúkur crater row · Observations: Reported |
| 18 December 1728 | — | 2 | Leirhnjúkur crater row · Observations: Reported |
| 18 April 1728 | — | 2 | Leirhnjúkur, Hrossadalur, Bjarnarflag · Observations: Reported |
| 21 August 1727 | — | 2 | North end of Leirhnjúkur · Observations: Reported |
| 17 May 1724 | 18 May 1724 | 2 | Víti (1.5 km east of Leirhnjúkur) · Observations: Reported |
| 1300 ± 200 years | — | 2 | Crater south of Víti · Correlation: Tephrochronology |
| c. 850 | — | 0 | Daleldar, Svortuborgir · Correlation: Tephrochronology |
| 250 ± 300 years | — | 0 | Kerlingarholar · Correlation: Tephrochronology |
| c. 50 BCE | — | 2 | Holseldar · Correlation: Tephrochronology |
| 500 BCE ± 300 years | — | 0 | North of Hverfjall · Correlation: Tephrochronology |
| c. 650 BCE | — | 4 | Hverfjall, Jarbadsholar · Correlation: Tephrochronology |
| c. 3,050 BCE | — | 0 | Hvannstód · Isotopic: 14C (uncalibrated) |
| c. 6,500 BCE | — | ? | Kröfluhalshraun · Correlation: Tephrochronology |
| c. 6,800 BCE | — | 2 | Hveragil · Correlation: Tephrochronology |
| c. 6,850 BCE | — | 2 | Bondholshraun, Hveragil · Correlation: Tephrochronology |
| c. 8,500 BCE | — | 0 | Gjastykkisbunga · Correlation: Tephrochronology |
Data: Global Volcanism Program, Smithsonian Institution (#373080)