[MIham] Purple Auroras

[FSK]

Space Weather News for July 23, 2004
http://spaceweather.com

Hours after a coronal mass ejection (CME) hit Earth's magnetic field on
July 22nd, a geomagnetic storm began, sparking auroras over parts of North
America.  Sky watchers spotted Northern Lights as far south as Minnesota,
Washington and Michigan in the United States. Some particularly nice
purple auroras appeared over Wisconsin.

The giant sunspot that triggered this activity is now crossing the middle
of the sun and could unleash more strong solar flares and CMEs in the days
ahead. Amateur astronomers using safe solar observing techniques should
have no trouble seeing the 'spot, which is wider than the planet Jupiter.

Visit Spaceweather.com for safe sunspot observing tips and up-to-date
photos of auroras.



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