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A new geomagnetic storm G3 is commencing: Kp-index 7. Be alert for aurora! #aurora

As reported by NOAA SWPC:

Space Weather Message Code: WARK07
Serial Number: 58
Issue Time: 2015 Sep 11 0854 UTC

WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2015 Sep 11 0850 UTC
Valid To: 2015 Sep 11 1400 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater – Strong to Extreme

NOAA Space Weather Scale descriptions can be found at

Mid-latitude aurora continuing #aurora 15h12 UT

A G2 magnetic storm is continuing although it’s shown signs of faltering. The Kp-index of 6 briefly reduced to 5 within the past two hours, but is now back up to 6 again. Auroral contact reports are again coming from as low as 50 deg N in Europe. Southern Autralia and New Zealand should be getting a good visual show right now.