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Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Longonot
Longonot as seen from the flanks of Suswa volcano (SSW of Longonot) in 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 on the flanks. Masai tradition records a lava flow on the N flank during the 19th century. Photo by Tom Jorstad, 1990 (Smithsonian Institution).
Volcano Number:
222100
Volcano Name:
Longonot
Country:
Kenya
Volcano Type:
Stratovolcano
Last Eruption:
1863 CE
Elevation:
2776m
Tectonic Setting:
Rift zone / Continental crust (> 25 km)
Pop. within 5km:
809
Pop. within 10km:
17893
Pop. within 30km:
410677
Pop. within 100km:
8750154
Latitude:
-0.914
Longitude:
36.446
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The trachytic Longonot stratovolcano SE of Lake Naivasha in the Gregory Rift valley contains a 8 x 12 km caldera. Formation of the caldera accompanied large explosive eruptions about 21,000 years ago. A large central cone that was constructed within the caldera, which forms the summit, is truncated by a circular, 1.8-km-wide crater. Post-caldera lavas are found on the caldera floor and the volcano's flanks, marking a late stage of effusive eruptions. A well-preserved satellitic cone is located on the NE flank. Masai tradition records a lava flow on the N flank during the 19th century. Similarly youthful-looking lava flows occur on the SW flank.
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Eruption Data from the Global Volcanism Program of the Smithsonian Institution
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Emissions Data from the Global Volcanism Program of the Smithsonian Institution
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Data from the Earthchem Library
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Data from the Earthchem Portal
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Data from the SESAR Database
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Data from the MaGa Database
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Data from UNAVCO
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Data from USIEI
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Data from IRIS FDSNWS
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