Who needs sunspots? The blank sun just sparked a 5-day episode of geomagnetic storms and intense polar auroras.
Space Weather News for Oct. 16, 2017
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SPOTLESS SUN SPARKS BRIGHT AURORAS: The sun is sliding into a deep Solar Minimum that continues to defy some expectations. For much of the past week, the sun was absolutely blank--no sunspots--and solar activity was deemed "very low." Nevertheless, space weather was stormy. From Oct. 11th through 15th, not a single day went by without a geomagnetic storm. Bright auroras were sighted not only around the poles, but also in a number of US states. The reason for these counterintuitive space storms is explained on today's edition of Spaceweather.com--along with expectations for more in the days ahead.
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Above: On Oct. 12, 2017, the sky above Tromsø, Norway, exploded in a spray of geomagnetic light. Colin Palmer photographed these bright green auroras from the island of Kvaloya. More images may be found in the Realtime Aurora Photo Gallery.
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