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East Gakkel Ridge at 85 E

East Gakkel Ridge at 85°E

Fissure vent · Undersea Features · 3800m (submarine)

Detailed bathymetry of the East Gakkel Ridge at 85°E in the Arctic Ocean. The inset map shows the location of the 85°E segment (yellow star) along the Gakkel Ridge (red line). The main panel shows illuminated color bathymetry (30-m grid spacing) of the 85°E segment acquired during the AGAVE expedition. The axial valley contains large numbers of distinctive, cratered volcanoes, including a cone on a fault terrace of the northern valley wall. Named features include two volcanic ridges in the center of the axial valley (Jessica’s Hill and Duque’s Hill), and three cratered volcanoes along a ridge-parallel fissure to the south (Oden, Thor, and Loke). The bathymetry data were plotted with Generic Mapping Tools.
Detailed bathymetry of the East Gakkel Ridge at 85°E in the Arctic Ocean. The inset map shows the location of the 85°E segment (yellow star) along the Gakkel Ridge (red line). The main panel shows illuminated color bathymetry (30-m grid spacing) of the 85°E segment acquired during the AGAVE expedition. The axial valley contains large numbers of distinctive, cratered volcanoes, including a cone on a fault terrace of the northern valley wall. Named features include two volcanic ridges in the center of the axial valley (Jessica’s Hill and Duque’s Hill), and three cratered volcanoes along a ridge-parallel fissure to the south (Oden, Thor, and Loke). The bathymetry data were plotted with Generic Mapping Tools. · Photo: Sohn et al., 2008. Explosive volcanism on the ultraslow-spreading Gakkel ridge, Arctic Ocean. Nature, v. 453, p. 1236-1238.
Type
Fissure vent
Country
Undersea Features
Region
Atlantic Ocean Volcanic Regions / Arctic Ridge Volcanic Province
Elevation
3800m (submarine)
Coordinates
85.608, 85.250
Last eruption
1999
Tectonic setting
Rift zone / Oceanic crust (< 15 km)
Landform
Cluster
Major rock type
No Data (checked)
Geological summary

During January-September 1999 global seismic networks detected an earthquake swarm along the East Gakkel Ridge (near 86°N, 85°E). Sonar mapping in May 1999 identified a cone at the western end of a line of volcanoes that corresponded to the average location of the epicenters (Edwards et al., 2001). A survey in July 2007 (Sohn et al., 2008) provided detailed bathymetry and named selected features, including the Oden (location of the 1999 seismicity), Thor, and Loke cones. Both Oden and Loke were covered with a light dusting of pyroclastic material, which was also found throughout the survey area, thought to be products of an eruption during the 1999 swarm.

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
1999~1999 · 1 eruptions · max VEI 219991999200020002000

Detailed timeline

  1. 1999VEI 2Observed
    1999-04-05 – 1999-04-15
    East Gakkel Ridge

External links

⚠ For reference only. Not for emergency response.