3 ms·
https://en.wikipedia.org/wiki/Crown_flash https://en.wikipedia.org/wiki/Crown_flash In a thundercloud change of its electro-magnetic field causes ice crystals
by emsign 6y ago
https://en.wikipedia.org/wiki/Crown_flash https://en.wikipedia.org/wiki/Crown_flash
In a thundercloud change of its electro-magnetic field causes ice crystals to change refraction of sunlight. But it looks like something that seems unlike a natural phenomenon.