Sun dogs (Fargo, North Dakota)

Sun dogs (Fargo, North Dakota)

Very bright sun dogs in Fargo, North Dakota, United States. Also visible are parts of the 22° halo (the arcs passing through each sundog), a sun pillar (the vertical line) and the parhelic circle (the horizontal line).

Sun dogs can be seen anywhere in the world during any season, but the best time is when the Sun is close to the horizon: they appear as a pair of bright spots on either horizontal side on the Sun, often co-occurring with a luminous ring known as a 22° halo(1).

Sun dogs are created by light interacting with ice crystals in the atmosphere, and also known as mock suns or phantom suns, and the meteorological name is parhelia (singular parhelion).

Photo: wikipedia

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