Wednesday, March 03, 2010

Is it a sun dog? Is it a parhelion? No, it´s a 22 degree halo.

Well, I never even knew such things existed before we got to Pimentel beach, north Peru, at noon. A bit of research later and I found out this rainbow round the sun (the pic doesn´t quite do the colour justice) is formed when light is refracted through hexagonal ice particles in thin high level clouds such as cirrostratus. Another "wow" on my long trip away.
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