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Kenya · Stratovolcano

Mount Longonot

Longonot

Type
Stratovolcano
Elevation
2776m
Last eruption
1863
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.
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: Photo by Tom Jorstad, 1990 (Smithsonian Institution).
Type
Stratovolcano
Country
Kenya
Region
Eastern Africa / Kenyan Rift Volcanic Province
Elevation
2776m
Coordinates
-0.914, 36.446
Last eruption
1863
Tectonic setting
Rift zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Trachyte / Trachydacite

Geological summary

The trachytic Longonot stratovolcano SE of Lake Naivasha in the Gregory Rift valley contains a 8 x 12 km caldera.

Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →

From Wikipedia

Mount Longonot is a stratovolcano located southeast of Lake Naivasha in the Great Rift Valley of Kenya, Africa. It is thought to have last erupted in the 1860s. Its name is derived from the Maasai word Olongongot, meaning "mountains of many spurs" or "steep ridges".

Wikipedia · CC BY-SA · Read full article →

Eruption history

3 recordedGlossary

Record summary

Confirmed eruptions
3
Uncertain eruptions
0
Span of confirmed record
7200 BCE (±100 yrs) – 1863
Largest confirmed eruption
VEI 0 (1863)
Confirmed eruptions since 1900
0
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
7200 BCE~6898 BCE · 1 eruptions · max VEI ?1460 BCE~1158 BCE · 1 eruptions · max VEI ?1561~1863 · 1 eruptions · max VEI 07200 BCE5085 BCE2668 BCE554 BCE1561

Detailed timeline

  1. 1863 (±5 yrs)VEI 0Geological estimate
    1863-07-02 – end unknown
    Northern flank
  2. 1330 BCE (±100 yrs)VEI ?Geological estimate
    1330 BCE – end unknown
  3. 7200 BCE (±100 yrs)VEI ?Geological estimate
    7200 BCE – end unknown

Nearby volcanoes

External links

⚠ For reference only. Not for emergency response.