South Island

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 2.63°N
  • 36.6°E

  • 800 m
    2624 ft

  • 222020
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

There are no activity reports for South Island.



 Available Weekly Reports

There are no Weekly Reports available for South Island.

Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1888 Unknown Confirmed 1 Historical Observations

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.

Bloomer S H, Curtis P C, Karson J A, 1989. Geochemical variation of Quaternary basaltic volcanoes in the Turkana Rift, northern Kenya. J African Earth Sci, 8: 511-532.

Dunkley P N, Smith M, Allen D A, Darling W G, 1993. The geothermal activity and geology of the northern sector of the Kenya Rift Valley. Brit Geol Surv Res Rpt, SC/93/1: 1-185.

Karson J A, Curtis P C, 1994. Axial Quaternary volcanic centers in the Turkana rift, N. Kenya. J African Earth Sci, 18: 15-35.

Ochieng J O, Wilkinson A F, Kagasi J, Kimomo S, 1988. Geology of the Loiyangalani area. Rpt Mines Geol Dept Kenya, 107: 1-53.

Richard J J, Neumann van Padang M, 1957. Africa and the Red Sea. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI 4: 1-118.

The southernmost and largest of the three volcanic islands in Lake Turkana, South Island contains numerous tuff cones. Fresh-looking lava flows, erupted from a N-S fissure extending the 11-km length of the island, form much of the eastern shoreline. South Island (sometimes referred to as Hohnel Island) rises 320 m above the lake to a height of 800 m and is part of a volcanic horst that extends 10 km to the north beneath the lake surface. Early stage tuff cone formation may have been associated with a high stand of Lake Turkana dated at about 10,000 years ago, and later subaerial activity postdates the last high stand of the lake about 3200 years ago. The dominantly basaltic lava flows are morphologically similar to the youthful Holocene flows of The Barrier volcano at the south end of Lake Turkana. An eruption from a scoria cone on South Island was witnessed during Count von Teliki's 1888 expedition.