From: Paul Doherty (pauld@exploratorium.edu)
Date: Tue Jun 04 2002 - 17:01:02 PDT
Message-Id: <l03110704b922e91917d4@[192.174.3.125]> Date: Tue, 4 Jun 2002 17:01:02 -0700 From: Paul Doherty <pauld@exploratorium.edu> Subject: solar halo display
On monday this week and at times over the last two weeks there have been
fantastic displays of solar halos over the bay area.
On Monday I saw a very bright 22 degree halo around the sun. One of the
brightest I have ever seen. (This halo is made when sunlight refracts
through ice crystals.)
Between the halo and the horizon was a horizontal (slightly up curving)
band of colors. The circumhorizontal arc. It is also caused by light
refracting through ice crystals.
Then there was also a white circle centered on the zenith, passing through
the sun itself. This rare arc was a parhelic circle made by light
reflecting off the faces of ice crystals.
What did other pinholers see?
Paul Doherty
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