Lake Monoun

Lake Monoun
A Landsat 7 satellite image
Location of Lake Monoun in Cameroon.
Location of Lake Monoun in Cameroon.
Lake Monoun
Location of Lake Monoun in Cameroon.
Location of Lake Monoun in Cameroon.
Lake Monoun
Coordinates5°35′N 10°35′E / 5.583°N 10.583°E / 5.583; 10.583
TypeMeromictic, limnically active lake, volcanic crater lake
Basin countriesCameroon
Max. length1.6 km (0.99 mi)
Max. width0.7 km (0.43 mi)
Surface area0.31 km2 (0.12 sq mi)
Max. depth99 m (325 ft)

Lake Monoun is a crater lake (maar) in West Province, Cameroon, that lies in the Oku Volcanic Field. On August 15, 1984, a limnic eruption occurred at the lake, which resulted in the release of a large amount of carbon dioxide (CO2) that killed 37 people. At first, the deaths remained unexplained, and causes such as terrorism were suspected. Further investigation and a similar event two years later at Lake Nyos led to the currently accepted explanation.[1]

  1. ^ Kusakabe, Minoru (2017-04-07). "Lakes Nyos and Monoun Gas Disasters (Cameroon) — Limnic Eruptions Caused by Excessive Accumulation of Magmatic CO2 in Crater Lakes" (PDF). Geochemistry Monograph Series. 1 (1): 1–50. doi:10.5047/gems.2017.00101.0001. Retrieved 2022-01-26. p. 7: Lake Monoun experienced a gas burst on 15 August 1984, that killed 37 people by asphyxiation. [..] It was found in a later survey that vegetation at the east end of the lake was flattened, indicating that the water wave locally reached up to 5 m high, and that the color of the lake water changed to a reddish brown.