Homa Mountain

Photo of this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 0.38°S
  • 34.5°E

  • 1751 m
    5743 ft

  • 222070
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Homa Mountain.

The Global Volcanism Program has no Weekly Reports available for Homa Mountain.

The Global Volcanism Program has no Bulletin Reports available for Homa Mountain.

Homa Mountain is a large carbonatitic complex that forms a broad peninsula on the eastern shore of Lake Victoria. The 1751-m-high flat-topped summit of the volcano rises about 600 m above the lake. This dominantly Miocene-to-Pleistocene volcanic complex contains numerous flank vents, including the carbonatitic and ultramafic Lake Simbi maar on the lower east flank. The Chiewo, Got Ojawa, and Got Oloo vents on the southern and western sides of Homa Mountain were formed during the latest stage of carbonatitic activity. Legends of inhabitants near the Lake Simbi maar suggest that it may have been formed in historical time.

The Global Volcanism Program is not aware of any Holocene eruptions from Homa Mountain. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Homa Mountain page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

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.


Cones

Feature Name Feature Type Elevation Latitude Longitude
Apoyo Cone
Chiewo Cone
Got Ojawa Cone
Got Oloo Cone
Ndiru Cone
Nyamatoto Cone
Nyasanja Cone
Odiawo Cone
Rapogi Cone
Ratieng Cone
Rongo Cone

Craters

Feature Name Feature Type Elevation Latitude Longitude
Simbi, Lake Maar 1153 m 0° 21' 0" S 34° 38' 0" E
The Homa Mountain volcanic complex rises beyond a Smithsonian Department of Anthropology archaeological site north of the volcano in which Miocene-Pliocene hominins were excavated. Homa Mountain is a dominantly Miocene-to-Pleistocene carbonatitic complex that forms a broad peninsula on the eastern shore of Lake Victoria. Numerous flank vents include the carbonatitic and ultramafic Lake Simbi maar on the lower east flank. Legends of inhabitants near this maar suggest that it may have been formed in historical time.

Photo by Chip Clark, 1994 (Smithsonian Institution).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. 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.

Le Bas M J, 1977. Carbonatite-Nephelinite Volcanism. New York: John Wiley, 347 p.

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.

Volcano Types

Complex

Tectonic Setting

Rift zone
Continental crust (> 25 km)

Rock Types

Major
Foidite
Phonolite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
16,124
60,670
628,701
10,069,120

Affiliated Databases

Large Eruptions of Homa Mountain Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.