Ukuqhuma kwenzeka ngaphakathi kwemingcele ethile, ikakhulukazi ngaphakathi kwemikhawulo yeziqhumane.
Imikhawulo yeziqhumane ye-CH4 emoyeni isukela 5% ku 15% ukuhlushwa kwe-methane. An explosion will ensue if the methane’s volumetric proportion falls within this 5% ku 15% ibanga bese lihlangana nelangabi elivulekile.