Hrómundartindur

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 64.073°N
  • 21.202°W

  • 540 m
    1771 ft

  • 371051
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Hrómundartindur.

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

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

Hrómundartindur is a small volcanic system located south of Thingvallavatn lake and immediately east of the Hengill volcanic system. It lies at a ridge-ridge-transform triple junction at the eastern end of the Reykjanes Peninsula, where the west Iceland volcanic zone changes direction from approximately W-E to SW-NE. Hrómundartindur was last active about 10,000 years ago, and displays vigorous geothermal activity at the Ölkeduháls geothermal field. The most recent eruptions in the Ölkeduháls area took place at the end of the latest glacial period, but Ölkeduháls currently contains numerous hot springs, mud pools, fumaroles, and mineral warm springs. Increased seismic activity and slow land uplift beginning in 1994 indicated magma flow into the roots of the volcanic system at 7 km depth. The activity continued for more than 4 years.

The Global Volcanism Program is not aware of any Holocene eruptions from Hrómundartindur. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Hrómundartindur 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
Maelifell Tuya 370 m 64° 6' 0" N 21° 12' 0" W
Midfell Tuya 322 m 64° 12' 0" N 21° 2' 0" W


Thermal
Feature Name Feature Type Elevation Latitude Longitude
Ölkeduháls Thermal
Steam rises from a hot pool in the Olkeduháls geothermal area of the Hrómundartindur volcanic system, which lies south of Thingvallavatn lake. The Olkeduháls geothermal field contains numerous hot springs, mud pools, fumaroles, and mineral warm springs. The Hengill volcanic system forms the ridge on the skyline immediately west of the Hrómundartindur volcanic system.

Photo by Lee Siebert, 2008 (Smithsonian Institution).
A group of volcanologists on a field trip observe activity at the Olkeduháls geothermal field of the Hrómundartindur volcanic system. This small volcanic system lies at a ridge-ridge-transform triple junction at the eastern end of the Reykjanes Peninsula, where the west Iceland volcanic zone changes direction from approximately W-E to SW-NE. The latest eruptions at Hrómundartindur took place at the end of the latest glacial period, but Hrómundartindur displays vigorous geothermal activity at the Olkeduháls geothermal field.

Photo by Lee Siebert, 2008 (Smithsonian Institution).

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.

Clifton A E, Sigmundsson F, Feigl K L, Gudmundsson G, Arnadottir T, 2002. Surface effects of faulting and deformation resulting from magma accumulation at the Hengill triple junction, SW Iceland, 1994-1998. J Volc Geotherm Res, 115: 233-255.

Einarsson P, 2008. . (pers. comm.).

Hansteen T H, 1991. Multi-stage evolution of the picritic Maelifell rocks, SW Iceland: constraints from mineralogy and inclusions of glass and fluid in olivine. Contr Mineral Petr, 109: 225-239.

Ivarsson G, 1998. Fumarole gas geochemistry in estimating subsurface temperatures at Hengill in southwestern Iceland. In: Arehart G B, Hulston J R (eds), {Water-Rock Interaction}, Rotterdam: Balkema, p 459-462.

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

Sigmundsson F, Einarsson P, Rognvaldsson S T, Foulger G R, Hodgkinson K M, Gunnar Thorbergsson G , 1997. The 1994-1995 seismicity and deformation at the Hengill triple junction, Iceland: triggering of earthquakes by minor magma injection in a zone of horizontal shear stress . J Geophys Res, 102: 15,151-15,161.

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

Volcano Types

Stratovolcano

Tectonic Setting

Rift zone
Oceanic crust (< 15 km)

Rock Types

Major
Basalt / Picro-Basalt

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
5,738
5,738
26,028
201,964

Affiliated Databases

Large Eruptions of Hrómundartindur 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.