Space Weather Message Code: WATA20 Serial Number: 989 Issue Time: 2024 Feb 22 1917 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Feb 23: None (Below G1) Feb 24: None (Below G1) Feb 25: 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.

Space Weather Message Code: WARK04 Serial Number: 4547 Issue Time: 2024 Feb 14 0542 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Feb 14 0542 UTC Valid To: 2024 Feb 14 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: ALTK04 Serial Number: 2426 Issue Time: 2024 Feb 13 1743 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Feb 13 1740 UTC Synoptic Period: 1500-1800 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: 4546 Issue Time: 2024 Feb 13 1642 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Feb 13 1641 UTC Valid To: 2024 Feb 14 0300 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: 4545 Issue Time: 2024 Feb 11 1140 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4544 Valid From: 2024 Feb 11 0217 UTC Now Valid Until: 2024 Feb 12 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: WATA30 Serial Number: 229 Issue Time: 2024 Feb 11 0746 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Feb 12: G1 (Minor) Feb 13: G2 (Moderate) Feb 14: 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 55 degrees Geomagnetic Latitude. Induced Currents

Space Weather Message Code: WARK05 Serial Number: 1852 Issue Time: 2024 Feb 11 0223 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2024 Feb 11 0220 UTC Valid To: 2024 Feb 11 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: ALTK04 Serial Number: 2425 Issue Time: 2024 Feb 11 0220 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Feb 11 0220 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: 4544 Issue Time: 2024 Feb 11 0217 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Feb 11 0217 UTC Valid To: 2024 Feb 11 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: WARSUD Serial Number: 219 Issue Time: 2024 Feb 11 0137 UTC WARNING: Geomagnetic Sudden Impulse expected Valid From: 2024 Feb 11 0155 UTC Valid To: 2024 Feb 11 0255 UTC IP Shock Passage Observed: 2024 Feb 11 0123 UTC NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation