No latest activity reported for Geysir.

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. 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. Additional discussion of data sources can be found under Volcano Data Criteria.

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

Pasvanoglu S, Kristmannsdottir H, Bjornsson S, Torfason H, 2000. Geochemical study of the Geysir geothermal field in Haukadalur, S-Iceland. {Proc World Geotherm Cong 2000, Kyushu - Tohoku, Japan, May 28 - June 10, 2000}, p 675-680

The Geysir volcanic system in the Haukadalur valley of SW Iceland consists of an eroded basaltic central volcano and rhyolitic lava domes of Pleistocene age. Geysers around the world are named for the Geysir geothermal field, which lies SE of the rhyolitic Laugarfjall lava dome and is one of the most frequently visited geological sites in Iceland. No eruptions are known from the Geysir volcanic system during the Holocene.