Cameroon Lake Nyos: Prevention not to repeat death of over 1.7K people

This tragic scenario did not happened before because warm superficial water layer that served like as sort of a cap that covered the volcanic gases, like sulfur- and carbon-dioxide, to come out to the surface.

These gases are more concentrated at the very bottom. Based on the article, geologist had no idea why the water layer failed to serve its purpose that night. One possibility why the gases would leaked was because of an earthquake or volcanic eruption. It was said that a rumble was heard near Lake Nyos that night