Eldey () is a small, uninhabited island about off the coast of the Reykjanes Peninsula in southwest Iceland. Located west-southwest of Reykjavík, the island of Eldey covers an area of about , and rises to a height of . Its sheer cliffs are home to large numbers of birds, including one of the largest northern gannet colonies in the world, with around 16,000 pairs. This colony can now be watched live via two webcams that are located on top of the island.
The Mid-Atlantic Ridge becomes at the Bight transform fault near 56.5°N the Reykjanes Ridge which extends north to Iceland's Reykjanes Peninsula at 63.87°N As it approaches Iceland the ridge becomes shallower, with a thickening of the oceanic crust beneath as it approaches the mantle plume associated with the Iceland hotspot. The Reykjanes Ridge has an average spreading rate of about /year.
The latest confirmed eruption of the Eldey axial volcanic ridge occurred at its northern extremity in 1926 and it may have been active in 1970. A tephra eruption northwest of Eldey dusted the western shore of the Reykjanes Peninsula of Iceland occurred in June 1879. Geirfuglasker erupted in 1879 and there were 3 eruptions near Eldey between 1211 and 1422. A small geothermal area is located at depth east of Eldey.
The last of the great auks
In literature
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