Mystery Behind the Blood Rain of Kerala

The freak weather went in 2001 stunned many residents of Kerala in India. Kerala is southernmost state of India which is very popular for its natural beauty and production of tea. Kerala is a leading state of India in the production of tea. Kerala is also a most literate state of India.
 The Mysterious red rain of Kerala baffled the entire world back in September 2001, when a heavy downpour of red coloured rain fell sporadically Kerala. It's called blood Rain.
Blood rain is a phenomenon in which blood is perceived to fall from the sky in the form of rain. This phenomenon consistently repeated in the 17th century, at that time people believe that the rain was actually blood.there is now a scientific reason behind this phenomenon that the blood rain is caused by Aerial spores of green microalgae.
The red coloured rain at Kerala fill between July to September 2001 and occurred often for 2 months. Although most reports Limited the colour of rain red like blood, some people also reported seeing black green and yellow rain as well.
This blood red Downpour, when collected by the locals, turned into clean water with red particles settle at the bottom, about 9 million red particles could be found.
According to scientific study, the pH of the rain was neutral, also found large Ameren of Nickel, manganese, chromium and Titanium.
Third red particles were determined to be mostly carbon and oxygen with a small amount of iron and silicon.
According to NASA " it's understood that blood rain occurs when a relatively high concentration of red coloured dust or particles get mixed into the rain, giving it a read appearance as it falls".
According to a report of NASA's Earth Observatory, mentions of blood rain date back to the Roman statesman Cicero before the birth of Christ.
The appearance of blood rain is a typically rare event either way and there have not been many recorded in history...