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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 0.77°N
  • 36.12°E

  • 1446 m
    4743 ft

  • 222054
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Korosi.

The Global Volcanism Program has no Weekly Reports available for Korosi.

The Global Volcanism Program has no Bulletin Reports available for Korosi.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Evidence Credible

1446 m / 4743 ft


Volcano Types

Tuff ring
Pyroclastic cone(s)
Lava dome(s)

Rock Types

Trachyte / Trachyandesite
Basalt / Picro-Basalt
Trachyandesite / Basaltic trachy-andesite

Tectonic Setting

Rift zone
Continental crust (> 25 km)


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

Geological Summary

The trachytic Korosi shield volcano lies at the north end of Lake Baringo. Unlike other rift valley volcanoes, it does not contain a summit caldera. Lava domes on the northern flanks have fed trachytic lava flows. The major stage of Korosi volcanism spanned a period between 0.4 and 0.1 million years ago and included the eruption of voluminous fluid basaltic lava flows and pyroclastic cone formation along a NNE-trending fissure cutting across the axis of the shield volcano. This was followed by the eruption of trachytic lava domes and pumice/scoria cones. The youngest activity, consisting of fissure-fed basaltic lava flows on the lower northern flanks between Korosi and Paka, was probably coeval with the latest eruptions on Ol Kokwe to the south, which are only a few hundred to a few thousand years old (Dunkley et al. 1993). Fumaroles and hot steaming ground occur around the summit cones and NW flanks over an area of 30 sq km.


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

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.

Hackman B D, 1988. Geology of the Baringo-Laikipia area. Rpt Mines Geol Dept Kenya, 104: 1-79.

Smith M, 1991. (pers. comm.).

Williams L A J, Macdonald R, Chapman G R, 1984. Late Quaternary caldera volcanoes of the Kenya Rift Valley. J Geophys Res, 89: 8553-8570.

The Global Volcanism Program is not aware of any Holocene eruptions from Korosi. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Korosi 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
Chesoro Vent
Kebongo Cone
Kolobochon Tuff ring


Feature Name Feature Type Elevation Latitude Longitude

Photo Gallery

Getang crater, also known as Kinyach, is a pit crater on the northern side of the Korosi summit area. The walls of the 600-m-wide, 120-m-deep crater expose trachytic lava flows. Unlike other rift valley volcanoes, Korosi does not contain a summit caldera. The youngest activity at Korosi, consisting of fissure-fed basaltic lava flows on the lower northern flanks, may have occurred only a few hundred to a few thousand years ago.

Photo by Martin Smith, 1993 (copyright British Geological Survey, NERC).

Smithsonian Sample Collections Database

There are no samples for Korosi in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites

Large Eruptions of Korosi 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.