Space Weather Message Code: ALTK05 Serial Number: 1421 Issue Time: 2023 Jan 04 0850 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2023 Jan 04 0845 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: ALTK05 Serial Number: 1420 Issue Time: 2023 Jan 04 0521 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2023 Jan 04 0520 UTC Synoptic Period: 0300-0600 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: 1730 Issue Time: 2023 Jan 04 0252 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2023 Jan 04 0250 UTC Valid To: 2023 Jan 04 0900 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: ALTK04 Serial Number: 2331 Issue Time: 2023 Jan 04 0237 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2023 Jan 04 0236 UTC Synoptic Period: 0000-0300 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

Space Weather Message Code: WARK04 Serial Number: 4234 Issue Time: 2023 Jan 04 0129 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2023 Jan 04 0129 UTC Valid To: 2023 Jan 04 1200 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: WATA20 Serial Number: 933 Issue Time: 2023 Jan 02 2117 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jan 03: None (Below G1) Jan 04: G1 (Minor) Jan 05: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT 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

Space Weather Message Code: WARK04 Serial Number: 4233 Issue Time: 2023 Jan 01 2354 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4232 Valid From: 2023 Jan 01 2131 UTC Now Valid Until: 2023 Jan 02 0900 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: 2330 Issue Time: 2023 Jan 01 2144 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2023 Jan 01 2144 UTC Synoptic Period: 2100-2400 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

Space Weather Message Code: WARK04 Serial Number: 4232 Issue Time: 2023 Jan 01 2132 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2023 Jan 01 2131 UTC Valid To: 2023 Jan 01 2359 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: 4231 Issue Time: 2023 Jan 01 0558 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4230 Valid From: 2022 Dec 31 2040 UTC Now Valid Until: 2023 Jan 01 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 –