Last weekend polar skies lit up brightly in response to a geomagnetic storm. But not all the lights in the sky were auroras.
Space Weather News for Sep. 5, 2019
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THE RETURN OF STEVE: Last weekend polar skies lit up brightly in response to a geomagnetic storm. But not all the lights in the sky were auroras. STEVE was there, too. Purple ribbons of non-auroral light arced over many locations in Canada and the United States. New research explains what powers STEVE and why it appears alongside the mysterious "green picket fence." Get the full story on today's edition of Spaceweather.com
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Above: The soft purple plume in this image is not an aurora. It's STEVE. Alan Dyer photographed it from the Saskatchewan Summer Star Party in Cypress Hills on Aug. 31st. Browse more images of STEVE.
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