Logo link to homepage

Þeistareykir

Photo of this volcano
  • Iceland
  • Iceland and Arctic Ocean
  • Shield
  • 900 BCE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 65.833°N
  • 17.166°W

  • 540 m
    1772 ft

  • 373090
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Þeistareykir.

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

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

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.

Eruptive History

There is data available for 3 Holocene eruptive periods.

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
0900 BCE ± 100 years Unknown Confirmed 0 Tephrochronology Storihver (Theistareykjahraun)
6800 BCE (?) Unknown Confirmed 0 Tephrochronology Borgarhraun and other flows
9500 BCE (?) Unknown Confirmed 0 Tephrochronology Theistareykjabunga shield volcano
Deformation History

There is data available for 1 deformation periods. Expand each entry for additional details.


Deformation during 2005 - 2009 [Uplift; Observed by GPS, InSAR]

Start Date: 2005 Stop Date: 2009 Direction: Uplift Method: GPS, InSAR
Magnitude: 3.000 cm Spatial Extent: Unknown Latitude: Unknown Longitude: Unknown

Remarks: InSAR analysis from 2005-2009 shows inflation at Theistareykir central volcano with a maximum deformation rate between 2007 and 2008.

Figure (see Caption)

Unwrapped ENVISAT interferograms spanning 2007?2008, with the deformation normalized to 1 yr (A/D), Mogi model prediction with the Mogi source M indicated (B/E), and residuals between the data and the model predictions (C/F) for ascending (A?C) and descending track (D?F). The dashed lines mark the model segments of the plate-boundary and the arrows indicate the line-of-sight (LOS) from the ground towards the satellite.

From: Metzger et al. 2011.


Reference List: Metzger et al. 2011.

Full References:

Metzger, S., Jónsson, S. and Geirsson, H., 2011. Locking depth and slip-rate of the Húsavík Flatey fault, North Iceland, derived from continuous GPS data 2006-2010. Geophysical Journal International, 187: 564-576. https://doi.org/10.1111/j.1365-246X.2011.05176.x

Emission History

There is no Emissions History data available for Þeistareykir.

Photo Gallery

Stora-Viti crater, seen here from the SE, caps the low, 564-m-high Theistareykjarbunga shield volcano, the northernmost subaerial volcanic system along the eastern volcanic zone of Iceland. The Holocene Theistareykjarbunga shield volcano and its associated N-S fissure system extend from north of Myvatn lake to the northern coast of Iceland. The youngest dated eruption produced the Theistareykjahraun lava flow about 2700 years ago.

Photo by Michael Ryan, 1984 (U.S. Geological Survey).
See title for photo information.
The small Litla-Viti pit crater (left) lies immediately SSW of Stora-Viti crater (right) at the summit of the very low-angle Theistareykjarbunga shield volcano. The low, 564-m-high shield volcano is part of the northernmost subaerial volcanic system of Iceland's eastern volcanic zone.

Photo by Michael Ryan, 1984 (U.S. Geological Survey).
See title for photo information.
An aerial view from the north shows features of the Theistareykjabunga and Krafla volcanic systems. The very-low-relief Theistareykjabunga volcano, capped by the summit craters of Stora-Viti and Litla-Viti, appears at the lower left. The topographically indistinct Krafla caldera (center) is cut by prominent fissure swarms. The flat, mesa-like areas at the right and other topographically prominent features throughout the photo are table mountains and ridges formed during Pleistocene subglacial eruptions.

Photo by Oddur Sigurdsson, 1977 (Icelandic National Energy Authority).
See title for photo information.
An aerial view from the north shows features of the Theistareykjabunga and Krafla volcanic systems. The very-low-relief Theistareykjabunga volcano, capped by the summit craters of Stora-Viti and Litla-Viti, appears at the lower left. The topographically indistinct Krafla caldera (center) is cut by prominent fissure swarms. The flat, mesa-like areas at the right and other topographically prominent features throughout the photo are table mountains and ridges formed during Pleistocene subglacial eruptions.

Photo by Oddur Sigurdsson, 1977 (Icelandic National Energy Authority).
See title for photo information.
GVP Map Holdings

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.


Title: Sandmuli
Publisher: DMA
Country: Iceland
Year: 1990
Series: C761
Map Type: Topographic
Scale: 1:50,000
Map of Sandmuli

Title: Trolladyngja
Publisher: DMA
Country: Iceland
Year: 1989
Series: C761
Map Type: Topographic
Scale: 1:50,000
Map of Trolladyngja

Title: Holuhraun
Publisher: DMA
Country: Iceland
Year: 1988
Series: C761
Map Type: Topographic
Scale: 1:50,000
Map of Holuhraun

Title: Dyngjufjoll
Publisher: DMA
Country: Iceland
Year: 1988
Series: C761
Map Type: Topographic
Scale: 1:50,000
Map of Dyngjufjoll

Title: Midausturland
Publisher: Geodetic Institute, Landmaelingar Islands
Country: Iceland
Year: 1988
Map Type: Topographic
Scale: 1:250,000
Map of Midausturland

Title: Geomorphology of Iceland
Publisher: University of Goteborg, Dept Phys Geog
Country: Iceland
Year: 1984
Map Type: Geology (Geomorphology)
Scale: 1:1,750
Map of Geomorphology of Iceland

Title: Geographical Names of Iceland
Publisher: University of Goteborg, Dept Phys Geog
Country: Iceland
Year: 1984
Map Type: Unknown
Scale: 1:1,750
Map of Geographical Names of Iceland

Title: Dyngjuvatn
Publisher: US Army Map Service
Country: Iceland
Year: 1949
Series: C762
Map Type: Topographic
Scale: 1:50,000
Map of Dyngjuvatn

Title: Oskjuvatn (Sudhur-Thingeyjarsysla)
Publisher: US Army Map Service
Country: Iceland
Year: 1949
Series: C762
Map Type: Topographic
Scale: 1:50,000
Map of Oskjuvatn (Sudhur-Thingeyjarsysla)

Title: Frambruni (Sudhur-Thingeyjarsysla)
Publisher: US Army Map Service
Country: Iceland
Year: 1949
Series: C762
Map Type: Topographic
Scale: 1:50,000
Map of Frambruni (Sudhur-Thingeyjarsysla)
Smithsonian Sample Collections Database

There are no samples for Þeistareykir in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

External Sites