Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 0.914°S
  • 36.446°E

  • 2776 m
    9105 ft

  • 222100
  • Latitude
  • Longitude

  • Summit

  • Volcano

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.

Eruptive History

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.

Photo Gallery

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).
See title for photo information.

Smithsonian Sample Collections Database

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

Affiliated Sites