3 Responses

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  On 5 July 2008 Jesús L. Yapor said:

  I've been noticing this more often than usual... do you know why it happens?

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  On 6 July 2008 Tony Bautts said:

  I found this link which explains somewhat:
  http://www.atoptics.co.uk/halo/circular.htm
  I'm assuming this one is related to the fires in Northern California. Before this, I've never seen one in SF.

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  On 8 July 2008 Jesús L. Yapor said:

  Interesting, thanks for the link. I've seen these in BC and in Oregon.
  One of mine: http://www.jpgmag.com/photos/828727