Oraefajokull

Photo of this volcano
Google Earth icon
  Google Earth Placemark
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 64°N
  • 16.65°W

  • 2119 m
    6950 ft

  • 374010
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Oraefajokull.

The Global Volcanism Program has no Weekly Reports available for Oraefajokull.

The Global Volcanism Program has no Bulletin Reports available for Oraefajokull.

Öraefajökull, Iceland's highest peak, is a broad glacier-clad central volcano at the SE end of the Vatnajökull icecap. A 4 x 5 km subglacial caldera truncates the summit of the dominantly basaltic and rhyolitic volcano. The extensive summit icecap is drained through deep glacial valleys dissecting the SW-to-SE flanks of the volcano. The largest-volume volcano in Iceland, 2119-m-high Öraefajökull was mostly constructed during Pleistocene glacial and interglacial periods. Holocene activity has been dominated by explosive summit eruptions, although flank lava effusions have also occurred. A major silicic eruption in 1362 CE was Iceland's largest historical explosive eruption. It and another eruption during 1727-28 were accompanied by major jökulhlaups (glacier outburst floods) that caused property damage and fatalities.

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1727 Aug 3 1728 May 1 ± 30 days Confirmed 4 Historical Observations Caldera, west flank (to 1100 m)
1362 Jun 5 ± 4 days 1362 Oct 15 ± 45 days Confirmed 5 Historical Observations

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.


Synonyms

Knappafellsjokull | Hnappafellsjokull | Orfialdsjokull

Cones

Feature Name Feature Type Elevation Latitude Longitude
Hofsfjall Cone 744 m
Storhofdi Cone 784 m

Domes

Feature Name Feature Type Elevation Latitude Longitude
Hvannadalshnjúkur Dome
Öræfajökull, Iceland's highest peak, is viewed here from the west, with the Svinafellsjökull glacier (left) descending from the central icecap nearly to the coastal road. A 4 x 5 km subglacial caldera truncates the summit, which rises to 2119 m about 10 km NW of the Atlantic Ocean shoreline. A major silicic eruption in 1362 was the largest in Iceland during historical time. It and another eruption during 1727-28 were accompanied by major jökulhlaups (glacier outburst floods) that caused property damage and fatalities.

Photo by Oddur Sigurdsson, 1986, (Orkustofnon, Icelandic National Energy Authority).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Gudmundsson M T, Larsen G, Hoskuldsson A, Gylfason A G, 2008. Volcanic hazards in Iceland. Jokull, 58: 251-268.

Newhall C G, Dzurisin D, 1988. Historical unrest at large calderas of the world. U S Geol Surv Bull, 1855: 1108 p, 2 vol.

Selbekk R S, Tronnes R G, 2007. The 1362 AD Oraefajokull eruption, Iceland: petrology and geochemistry of large-volume homogeneous rhyolite. J Volc Geotherm Res, 160: 42-58.

Sharma K, Self S, Blake S, Thordarson T, Larsen G, 2008. The AD Oraefajokull eruption, S.E. Iceland: physical volcanology and volatile release. J Volc Geotherm Res, 178: 719-739.

Steinthorsson S, et al., 2002. Catalog of Active Volcanoes of the World - Iceland. Unpublished manuscript.

Stevenson J A, McGarvie D W, Smellie J L, Gilbert J S, 2006. Subglacial and ice-contact volcanism at the Oraefajokull stratovolcano, Iceland. Bull Volc, 68: 737-752.

Thorarinsson S, 1958. The Oraefajokull eruption of 1362. Acta Nat Islandica, 2: 1-102.

Volcano Types

Stratovolcano
Subglacial
Pyroclastic cone(s)
Lava dome

Tectonic Setting

Rift zone
Oceanic crust (< 15 km)

Rock Types

Major
Basalt / Picro-Basalt
Rhyolite
Minor
Trachyte / Trachyandesite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
2
367
2,723

Affiliated Databases

Large Eruptions of Oraefajokull Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.