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Space Weather Message Code: WARK04
Serial Number: 3576
Issue Time: 2018 Dec 31 0137 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Dec 31 0140 UTC
Valid To: 2018 Dec 31 0900 UTC
Warning Condition: Onset
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
https://www.swpc.noaa.gov/products/alerts-watches-and-warnings