w-055-00

In gallery: Atmospheric optics Ice crystal halos 18o parhelia

Upper tangent arc, 22o halo, 23o upper parhelion, parhelic circle and right 18o parhelion. The 18o parhelia are exceedingly rare, as the 23o upper parhelion.

Photographed in Wijdenes, The Netherlands (May 26, 1999)