Some questions about lightningmaps.org

[kimmybjonsson]

Hi all!
I got curious while watching live strikes:

why do stations become red?
why are distant lines blue?
why are some llines green?
why do some stations not sense even the nearby strikes?

is there a way to see the uncertainty of a located strike?
is there a way to see a history of more than 24 hours?

Kind regards,
kimmybjonsson