Hofsjokull

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 64.78°N
  • 18.92°W

  • 1782 m
    5845 ft

  • 371090
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Hofsjokull.

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

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

Hofsjökull volcano lies along an east-west-trending area connecting the two principal rift zones of Iceland. It bridges the gap between the Reykjanes-Langjökull rift on the west, which terminates at Langjökull, and the eastern zone, which extends NE-ward across east-central Iceland. The roughly 7 x 11 km central caldera of Hofsjökull volcano lies beneath the western part of the massive Hofsjökull icecap. A small Holocene shield volcano is located at the SW margin of the icecap. Flank fissures north and east of the icecap have produced basaltic lava flows during the Holocene. Kerlingarfjöll, a glacially dissected, largely Pleistocene rhyolitic central volcano located SW of the Hofsjökull icecap, is considered part of the Hofsjökull volcanic system. Steep-sided Pleistocene rhyolitic lava domes and numerous hot springs occupy two calderas at the center of the 5 x 7 km wide complex. Fumarolic activity at Kerlingarfjöll, mostly concentrated in the center of the complex, is the most vigorous in Iceland.

The Global Volcanism Program is not aware of any Holocene eruptions from Hofsjokull. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Hofsjokull page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

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.


Cones

Feature Name Feature Type Elevation Latitude Longitude
Kerlingarfjöll Stratovolcano 1488 m 64° 47' 0" N 18° 55' 0" W

Craters

Feature Name Feature Type Elevation Latitude Longitude
Haolduhraun Fissure vent 800 m 64° 50' 0" N 18° 26' 0" W
Illahraun Crater Row 860 m 64° 39' 0" N 19° 6' 0" W
Illvidrahnjukahraun Fissure vent 940 m 64° 58' 0" N 18° 43' 0" W
Lambahraun Fissure vent 860 m 64° 59' 0" N 18° 50' 0" W

Domes

Feature Name Feature Type Elevation Latitude Longitude
Draugafell Dome 64° 36' 0" N 19° 13' 0" W
East Trollabarmur Dome 64° 38' 0" N 19° 9' 0" W
Efri Kisubotnahunukur Dome 64° 37' 0" N 19° 10' 0" W
Eyvindur Dome 64° 36' 0" N 19° 11' 0" W
Fannborg Dome
Höttur Dome 64° 37' 0" N 19° 20' 0" W
Hverahnukur Dome 64° 38' 0" N 19° 14' 0" W
Klakkur Dome 64° 35' 0" N 19° 16' 0" W
Lodhmundur Dome 1429 m 64° 39' 0" N 19° 13' 0" W
Maenir Dome 1357 m 64° 38' 0" N 19° 19' 0" W
Ogmundur Dome 1357 m 64° 38' 0" N 19° 22' 0" W
Sanekollur Dome 64° 38' 0" N 19° 13' 0" W
Snaekollur Dome 1488 m 64° 39' 0" N 19° 14' 0" W
South Höttur Dome 64° 37' 0" N 19° 20' 0" W
Tindur Dome 1023 m 64° 38' 0" N 19° 23' 0" W
The broad glacier-capped Hofsjökull volcano lies beneath the western part of the massive Hofsjökull icecap along an east-west-trending area connecting the two principal rift zones of Iceland. The roughly 7 x 11 km wide central caldera of Hofsjökull volcano is buried beneath the icecap to the right of the high point in this view from the NNW. Flank fissures on the northern and eastern sides of the volcano have produced basaltic lava flows during the Holocene.

Photo by Oddur Sigurdsson, 1978 (Icelandic National Energy Authority).
The flanks of the largely Pleistocene rhyolitic central volcano Kerlingarfjöll have been deeply dissected by glaciers. The volcanic complex is seen here from the NNE. Steep-sided Pleistocene rhyolitic lava domes and numerous hot springs occupy two calderas at the center of the 5 x 7 km wide complex. Holocene flank fissures on the NE side produced the Illahraun lava flow, which traveled more than 20 km to the south. Fumarolic activity at Kerlingarfjöll, mostly concentrated in the center of the complex, is the most vigorous in Iceland.

Photo by Oddur Sigurdsson, 1998 (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.

Flude S, McGarvie D W, Burgess R, Tindle A G, 2010. Rhyolites at Kerlingarfjoll, Iceland: the evolution of lifespan of silicic central volcanoes. Bull Volc, 72: 523-538.

Gudmundsson A T, 1986b. Iceland-Fires. Reykjavik: Vaka-Helgafell, 168 p.

Johannesson H, Saemundsson K, 1998. Geological map of Iceland, 1:500,000. Tectonics. Icelandic Inst Nat Hist, Reykjavik.

Kjartansson G, 1964. Geological Map of Iceland, Sheet 5, Central Iceland. Reykjavik: Museum Nat Hist Dept Geol Geog, 1:250,000 geol map.

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

Stevenson J A, Smellie J L, McGarvie D W, Gilbert J S, Cameron B I, 2009. Subglacial intermediate volcanism at Kerlingarfjoll, Iceland: magma-water interactions beneath thick ice. J Volc Geotherm Res, 185: 337-351.

Thordarson T, Hoskuldsson A, 2008. Postglacial eruptions in Iceland. Jokull, 58: 197-228.

Volcano Types

Subglacial
Caldera(s)
Stratovolcano
Fissure vent(s)
Lava dome(s)

Tectonic Setting

Rift zone
Oceanic crust (< 15 km)

Rock Types

Major
Basalt / Picro-Basalt
Rhyolite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
0
3,436

Affiliated Databases

Large Eruptions of Hofsjokull 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.