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+--- Thread: An explosion on the sun yesterday (Aug. 16) hurled a coronal mass ejection (CME) toward Earth. (/showthread.php?tid=277366)
An explosion on the sun yesterday (Aug. 16) hurled a coronal mass ejection (CME) toward Earth. - davetclown - 08-18-2006
AURORA WATCH: An explosion on the sun yesterday (Aug. 16) hurled a coronal mass ejection (CME) toward Earth. The approaching cloud could spark a geomagnetic storm when it arrives, probably on August 18th. Sky watchers should be alert for auroras.
If a storm erupts, the best displays will be at higher latitudes: e.g., Alaska, Canada, and Scandinavia. However, auroras could descend to lower latitudes, too, spreading across northern-tier US states from Maine to Washington and elsewhere.
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:
[url ""]http://www.spaceweather.com/aurora/gallery_01aug06.htm[/url]
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