The other two lakes, Lake Nyos and Lake Monoun both experienced eruptions. The bigger eruption at Lake Nyos led to the release of carbon dioxide into the air, suffocating more than 1,700 people.

The lake is filled with greyish-blue water that usually forms vapour. 3. Lake Monoun Lake Monoun is in Cameroon. It is quite dangerous, with significant gas beneath the water’s surface.

In the 1980s, limnic eruptions occurred at two crater lakes, Lake Nyos and Lake Monoun, in which large quantities of CO 2 that had collected on the lake bottom suddenly erupted to the surface. 1,800 ...