Red rain in Kerala
Episodes of rain containing vast amounts of red algal spores in India
Red rain in Kerala
The Kerala red rain phenomenon was a blood rain event that occurred in Wayanad district of the southern Indian state Kerala on Monday, 15 July 1957 , and also from 25 July to 23 September 2001, when heavy downpours of red-coloured rain fell sporadically in Kerala, staining clothes pink. Yellow, green and black rain was also reported. Coloured rain was also reported in Kerala in 1896 and several times since, most recently in June 2012, and from 15 November 2012 to 27 December 2012 in eastern and north-central provinces of Sri Lanka. Following a light-microscopy examination in 2001, it was initially thought that the rains were coloured by fallout from a hypothetical meteor burst, but a study commissioned by the Government of India concluded that the rains had been coloured by airborne spores from a locally prolific terrestrial green algae from the genus Trentepohlia.
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