Geomagnetic Storm KP5

Space Weather Message Code: ALTK05 Serial Number: 1350 Issue Time: 2021 Dec 19 2230 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2021 Dec 19 2229 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G1 – Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents – Weak power grid fluctuations can occur. Spacecraft – Minor impact on satellite operations possible. Aurora – Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.