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Longonot volcano

Stratovolcano 2776 m / 9,108 ft
Kenya, -0.91°S / 36.45°E
Current status: dormant (1 out of 5)
Longonot volcano books
Typical eruption style: unspecified
Longonot volcano eruptions: 1863 ± 5 years No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

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 forms the 2776-m-high summit of the volcano. The younger cone 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 northern flank during the 19th century. Similarly youthful-looking lava flows occur on the SW flank.
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Smithsonian / GVP volcano information

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