Home   OPOD   What's New    Rays & Shadows   Water Droplets   Rainbows   Ice Halos     Contents     Crystals     Frequent Halos       22° circular       Sundogs       Tangent Arcs       Circumscribed       Pillars       Circumzenithal       Circumhorizon       Parhelic Circle     Infrequent Halos     Multiple Displays     Other Worlds     Observing Halos     HaloSim   High Atmosphere   Links & Resources   Search - Index   123456789012345678		Frequent Halos
		Halos appear in our skies far more often than do rainbows.  They can be seen on average twice a week in Europe and parts of the United States.  The 22� radius circular halo and sundogs (parhelia) are the most frequent. In this HaloSim3 simulation the sun is surrounded by a 22� halo and flanked by sundogs. Passing through the sundogs and extending beyond them is the parhelic circle. It sometimes encircles the whole sky at the same altitude as the sun. Upper and lower tangent arcs touch the 22� halo directly above and below the sun. A circumzenithal arc is high above all.   The ice crystals pictured are those forming each particular halo.   Click the simulation text to go to the halo.

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