Aurora Watch for Friday night
August 18:
http://spaceweather.com/
Sometimes during a geomagnetic storm, the sky appears to be blank--no auroras. The display may be too faint to see with the unaided eye. Try using your camera: a 15+ second exposure can reveal colorful auroras just below the threshold of naked-eye visibility. An example of "photographic auroras" over Colorado may be found in our most recent aurora gallery:
http://www.spaceweather.com/aurora/gallery_01aug06.htm
http://spaceweather.com/
Sometimes during a geomagnetic storm, the sky appears to be blank--no auroras. The display may be too faint to see with the unaided eye. Try using your camera: a 15+ second exposure can reveal colorful auroras just below the threshold of naked-eye visibility. An example of "photographic auroras" over Colorado may be found in our most recent aurora gallery:
http://www.spaceweather.com/aurora/gallery_01aug06.htm
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