Saturday, July 21, 2007

PHOTOGRAPHIC AURORAS: Last night, auroras billowed over the corn fields of central Wisconsin. To the naked eye they were dull and almost unnoticable, but a 28s exposure with Tony Wilder's Canon30D revealed a different picture:

"Auroras in summer!," says Wilder. "Christmas came 6 months early."

The source of the display was a solar wind stream that hit Earth late on July 20th, rattling Earth's magnetic field and producing a storm of magnitude 5 on the 0-to-9 Kindex scale of geomagnetic activity. Another solar wind stream is due on July 26th. Ready your cameras!

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