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

  • Volcano

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.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Evidence Credible

1751 m / 5743 ft


Volcano Types


Rock Types


Tectonic Setting

Rift zone
Continental crust (> 25 km)


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Geological Summary

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

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.

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.


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


Feature Name Feature Type Elevation Latitude Longitude
Simbi, Lake Maar 1153 m 0° 21' 0" S 34° 38' 0" E

Photo Gallery

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).

Smithsonian Sample Collections Database

The following 11 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections. Catalog number links will open a window with more information.

Catalog Number Sample Description
NMNH 110903 Carbonatite
NMNH 110904 Carbonatite
NMNH 110905 Feldspathized ijolite
NMNH 110906 Phonolitic nephelinite
NMNH 110908 Melteigite
NMNH 110909 Ijolite
NMNH 110912 Phonolitic nephelinite
NMNH 110913 Carbonatite
NMNH 110914 Carbonatite
NMNH 110915 Carbonatite
NMNH 110916 Syenodiorite

Affiliated Sites

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).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.