- Info & Contacts
The Global Volcanism Program has no activity reports for Longonot.
The Global Volcanism Program has no Weekly Reports available for Longonot.
The Global Volcanism Program has no Bulletin Reports available for Longonot.
Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1863 ± 5 years||Unknown||Confirmed||0||Anthropology||Northern flank|
|1330 BCE ± 100 years||Unknown||Confirmed||Radiocarbon (uncorrected)|
|7200 BCE ± 100 years||Unknown||Confirmed||Radiocarbon (uncorrected)|
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.
|Ol Olongot | Olonongot|
|The broad trachytic Longonot stratovolcano SE of Lake Naivasha is seen from the flanks of Suswa volcano (SSW of Longonot) rising above the floor of the Eastern Rift Valley of Kenya. The modern cone was constructed within a broad 8 x 12 km caldera and itself contains a smaller 1.8-km-wide summit crater that gives the summit a flat profile. Post-caldera lavas are found on the caldera floor and the volcano's flanks. Masai tradition records a lava flow on the northern flank during the 19th century.
Photo by Tom Jorstad, 1990 (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.
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.
Rogers N W, Evans P J, Blake S, Scott S C, Hawkesworth C J, 2004. Rates and timescales of fractional crystallization from 238U-230Th-226Ra disequilibria in trachyte lavas from Longonot volcano, Kenya. J Petr, 45: 1747-1776.
Scott S C, 1980. The geology of Longonot volcano, Central Kenya: a question of volumes. Phil Trans Roy Soc London, Ser A, 296: 438-466.
Thompson A O, Dodson R G, 1963. Geology of the Naivasha area. Geol Surv Kenya Rpt, 55: 1-80.
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.
|Large Eruptions of Longonot||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.|