Space Weather Message Code: ALTK04
Serial Number: 2181
Issue Time: 2020 Dec 21 2314 UTC
ALERT: Geomagnetic K-index: 4
Threshold Reached: 2020 Dec 21 2311 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: YES!
Potential Impacts: Area of impact primarily poleward of 65° Geomagnetic Latitude.
Induced Currents – Weak power grid fluctuations can occur.
Aurora – Northern Lights may be visible at High Latitudes (60°+) for example in: Sweden, Finland and Norway.