Space Weather Message Code: WARK04 Serial Number: 4225 Issue Time: 2022 Dec 29 2244 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Dec 29 2244 UTC Valid To: 2022 Dec 30 0600 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

Space Weather Message Code: WARK04 Serial Number: 4224 Issue Time: 2022 Dec 27 1156 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4223 Valid From: 2022 Dec 26 1042 UTC Now Valid Until: 2022 Dec 27 2100 UTC Warning Condition: Persistence 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 –

Space Weather Message Code: ALTK05 Serial Number: 1416 Issue Time: 2022 Dec 27 0859 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Dec 27 0859 UTC Synoptic Period: 0600-0900 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.

Space Weather Message Code: WARK05 Serial Number: 1724 Issue Time: 2022 Dec 27 0539 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2022 Dec 27 0538 UTC Valid To: 2022 Dec 27 1200 UTC Warning Condition: Onset 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

Space Weather Message Code: WARK04 Serial Number: 4223 Issue Time: 2022 Dec 27 0129 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4222 Valid From: 2022 Dec 26 1042 UTC Now Valid Until: 2022 Dec 27 1200 UTC Warning Condition: Persistence 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 –

Space Weather Message Code: ALTK05 Serial Number: 1415 Issue Time: 2022 Dec 26 1653 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Dec 26 1650 UTC Synoptic Period: 1500-1800 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.

Space Weather Message Code: ALTK05 Serial Number: 1414 Issue Time: 2022 Dec 26 1456 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Dec 26 1455 UTC Synoptic Period: 1200-1500 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.

Space Weather Message Code: WARK05 Serial Number: 1723 Issue Time: 2022 Dec 26 1454 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2022 Dec 26 1454 UTC Valid To: 2022 Dec 26 2100 UTC Warning Condition: Onset 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

Space Weather Message Code: WARK04 Serial Number: 4222 Issue Time: 2022 Dec 26 1411 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4221 Valid From: 2022 Dec 26 1042 UTC Now Valid Until: 2022 Dec 27 0300 UTC Warning Condition: Persistence 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 –

Space Weather Message Code: ALTK04 Serial Number: 2327 Issue Time: 2022 Dec 26 1123 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 Dec 26 1120 UTC Synoptic Period: 0900-1200 UTC Active Warning: Yes 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