Space Weather Message Code: ALTK04 Serial Number: 2401 Issue Time: 2023 Oct 01 0101 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2023 Oct 01 0059 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: 4468 Issue Time: 2023 Oct 01 0050 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2023 Oct 01 0050 UTC Valid To: 2023 Oct 01 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: WARK04 Serial Number: 4467 Issue Time: 2023 Sep 29 1455 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4466 Valid From: 2023 Sep 29 0830 UTC Now Valid Until: 2023 Sep 29 2100 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 –

Space Weather Message Code: ALTK04 Serial Number: 2400 Issue Time: 2023 Sep 29 0905 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2023 Sep 29 0859 UTC Synoptic Period: 0600-0900 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: 4466 Issue Time: 2023 Sep 29 0832 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2023 Sep 29 0830 UTC Valid To: 2023 Sep 29 1500 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: 4465 Issue Time: 2023 Sep 27 0835 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4464 Valid From: 2023 Sep 24 2025 UTC Now Valid Until: 2023 Sep 27 1500 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: WARK04 Serial Number: 4464 Issue Time: 2023 Sep 27 0255 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4463 Valid From: 2023 Sep 24 2025 UTC Now Valid Until: 2023 Sep 27 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: WARK04 Serial Number: 4463 Issue Time: 2023 Sep 26 2054 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4462 Valid From: 2023 Sep 24 2025 UTC Now Valid Until: 2023 Sep 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: WARK06 Serial Number: 498 Issue Time: 2023 Sep 26 1449 UTC EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 497 Valid From: 2023 Sep 26 1100 UTC Now Valid Until: 2023 Sep 26 1800 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 55 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK06 Serial Number: 497 Issue Time: 2023 Sep 26 1447 UTC EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 496 Valid From: 2023 Sep 26 1100 UTC Now Valid Until: 2023 Sep 23 1800 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 55 degrees Geomagnetic Latitude. Induced Currents –