Suswa

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 1.175°S
  • 36.35°E

  • 2356 m
    7728 ft

  • 222110
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Suswa.

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

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

The southernmost caldera of the Kenya rift, Suswa contains a prominent lava cone on the south side of its 8 x 12 km caldera. Suswa lies south of Longonot volcano and about 50 km WNW of the capital city of Nairobi. Construction of an early shield volcano was followed by eruption of voluminous Pleistocene pumice flows and lava flows that accompanied incremental formation of the caldera. The 2356-m summit of the phonolitic-to-trachytic volcano is formed by the post-caldera lava cone of Ol Doinyo Onyoke ("The Red Mountain," also known as Ol Doinyo Nyukie) on the south side of the caldera. Its large elongated summit crater is truncated on the north by a ring graben. This unusual 5-km-wide circular graben at the center of the older caldera isolates a tilted island block of caldera-floor lava flows. The latest eruptions of Suswa have originated from satellitic vents that have issued still-unvegetated lava flows that may be only a century or so old.

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



Synonyms
Susua


Cones
Feature Name Feature Type Elevation Latitude Longitude
Onyoke, Ol Doinyo
    Nyukie, Ol Doinyo
    Nyuki, Doinya La
    Red Mountain
Stratovolcano 2356 m 1° 10' 30" S 36° 21' 0" E
Sampu Olkuo
    Manyatta
Cinder cone


Craters
Feature Name Feature Type Elevation Latitude Longitude
Enkorika Fissure vent
The central caldera of Suswa, the southernmost caldera of the Kenya rift, contains an unusual 5-km-wide circular graben that isolates a tilted island block of caldera-floor lava flows. Construction of an early shield volcano was followed by eruption of voluminous pumice flows and lava flows that accompanied formation of the caldera. The latest eruptions of Suswa have originated from parasitic vents that have issued still-unvegetated lava flows that may be only a century or so old. North is to the top in this NASA Landsat image.

NASA Landsat7 image (worldwind.arc.nasa.gov)

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.

Johnson R W, 1969. Volcanic geology of Mount Suswa, Kenya. Phil Trans Roy Soc London, 265: 383-412.

McCall G J H, Bristow C M, 1965. An introductory account of Suswa volcano, Kenya. Bull Volc, 28: 333-367.

Nash W P, Carmichael I S E, Johnson R W, 1969. The mineralogy and petrology of Mount Suswa, Kenya. J Petr, 10: 409-439.

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.

Skilling I P, 1993. Incremental caldera collapse of Suswa volcano, Gregory Rift Valley, Kenya. J Geol Soc London, 150: 885-896.

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.

Volcano Types

Shield
Caldera
Stratovolcano

Tectonic Setting

Rift zone
Continental crust (> 25 km)

Rock Types

Major
Phonolite
Trachyte / Trachyandesite
Minor
Trachybasalt / Tephrite Basanite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
474
4,041
105,232
6,914,644

Affiliated Databases

Large Eruptions of Suswa 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.