Space Weather Message Code: WARK07 Serial Number: 108 Issue Time: 2024 Jun 28 1324 UTC WARNING: Geomagnetic K-index of 7 or greater expected Valid From: 2024 Jun 28 1325 UTC Valid To: 2024 Jun 28 2100 UTC Warning Condition: Onset NOAA Scale: G3 or greater NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK06 Serial Number: 577 Issue Time: 2024 Jun 28 1311 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2024 Jun 28 1310 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G2 – Moderate 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 – Power grid fluctuations can occur. High-latitude

Space Weather Message Code: ALTK05 Serial Number: 1604 Issue Time: 2024 Jun 28 1221 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2024 Jun 28 1220 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: ALTK06 Serial Number: 576 Issue Time: 2024 Jun 28 1147 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2024 Jun 28 1147 UTC Synoptic Period: 0900-1200 UTC Active Warning: Yes NOAA Scale: G2 – Moderate 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 – Power grid fluctuations can occur. High-latitude

Space Weather Message Code: WARK06 Serial Number: 530 Issue Time: 2024 Jun 28 1136 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2024 Jun 28 1135 UTC Valid To: 2024 Jun 28 1800 UTC Warning Condition: Onset NOAA Scale: G2 – Moderate 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 – Power grid

Space Weather Message Code: ALTK05 Serial Number: 1603 Issue Time: 2024 Jun 28 1125 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2024 Jun 28 1125 UTC Synoptic Period: 0900-1200 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: WARSUD Serial Number: 230 Issue Time: 2024 Jun 28 0926 UTC WARNING: Geomagnetic Sudden Impulse expected Valid From: 2024 Jun 28 1005 UTC Valid To: 2024 Jun 28 1035 UTC IP Shock Passage Observed: 2024 Jun 28 0912 UTC NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation

Space Weather Message Code: WARK04 Serial Number: 4640 Issue Time: 2024 Jun 28 0555 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4639 Valid From: 2024 Jun 27 2153 UTC Now Valid Until: 2024 Jun 28 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: WARK05 Serial Number: 1892 Issue Time: 2024 Jun 28 0555 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1891 Valid From: 2024 Jun 28 0150 UTC Now Valid Until: 2024 Jun 28 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK04 Serial Number: 2456 Issue Time: 2024 Jun 28 0221 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Jun 28 0202 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