Rare Haloes

Some haloes are rare because they depend on particular types of ice crystals with the right orientation. Some of them may only be seen once every few years in cirrus clouds. Diamond dust ice crystals floating in the air at ground level offer more opportunities but it it doesn't get cold enough here.

Parhelic circle

Parhelic circle Circumhorizon arc

Circumhorizon arc

Supralateral arc

Supralateral arc Halo Display

Halo Display

Other Halo Topics