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Aureoles and Crepuscular Rays on February 23rd, 2008

Coronae do not always show multiple coloured rings. If the diffracting droplets are small and not quite evenly-sized, an aureole with a bright and often bluish center and a reddish rim can be seen. This was the case on Februay 23rd, 2008. With temperatures around the freezing point, thick fog had completely filled the Mosel valley. On the hilltops the solar disk was shining through the fog, surrounded by an aureole with a strongly blue centre and a broad brownish or reddish ring. Crepuscular rays from light filtering through the branches created a surreal landscape.

Crepuscular rays and aureole. Nikon D80, unprocessed compressed image.

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