Editing Cloud (section)

====Other genitus and mutatus clouds====

The genitus and mutatus categories have been expanded to include certain types that do not originate from pre-existing clouds. The term ''flammagenitus'' (Latin for 'fire-made') applies to cumulus congestus or cumulonimbus that are formed by large scale fires or volcanic eruptions, the latter having reached altitudes of {{cvt|57|km|mi}},<ref name="z578">{{cite web | title=Tonga volcano had highest plume ever recorded, new study confirms | website=University of Oxford | date=2022-01-15 | url=https://www.ox.ac.uk/news/2022-11-04-tonga-volcano-had-highest-plume-ever-recorded-new-study-confirms | access-date=2025-03-18}}</ref> and nuclear [[mushroom cloud]]s having an upward extend of up to {{cvt|67|km}}.<ref>{{cite magazine |last=Veselov |first=A.V. |title=Tsar-bomba |magazine=Atompress |year=2006 |volume=43 |issue=726 |page=7}}</ref> Smaller low-level "pyrocumulus" or "fumulus" clouds formed by contained industrial activity are now classified as cumulus ''homogenitus'' (Latin for 'man-made'). [[Contrail]]s formed from the exhaust of aircraft flying in the upper level of the troposphere can persist and spread into formations resembling cirrus which are designated cirrus ''homogenitus''.  If a cirrus homogenitus cloud changes fully to any of the high-level genera, they are termed cirrus, cirrostratus, or cirrocumulus ''homomutatus''. Stratus cataractagenitus (Latin for 'cataract-made') are generated by the spray from waterfalls. ''Silvagenitus'' (Latin for 'forest-made') is a stratus cloud that forms as water vapor is added to the air above a forest canopy.<ref name="mother-clouds" />