Space Weather Message Code: ALTK05 Serial Number: 1306 Issue Time: 2021 Jan 25 2203 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2021 Jan 25 2203 UTC Synoptic Period: 2100-2400 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: 1570 Issue Time: 2021 Jan 25 2148 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2021 Jan 25 2148 UTC Valid To: 2021 Jan 26 0300 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: 2187 Issue Time: 2021 Jan 25 2143 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Jan 25 2143 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: 3807 Issue Time: 2021 Jan 25 2129 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Jan 25 2130 UTC Valid To: 2021 Jan 26 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: 3806 Issue Time: 2021 Jan 25 1155 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3805 Valid From: 2021 Jan 25 0735 UTC Now Valid Until: 2021 Jan 25 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: ALTK04 Serial Number: 2186 Issue Time: 2021 Jan 25 0906 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Jan 25 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: 3805 Issue Time: 2021 Jan 25 0735 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Jan 25 0735 UTC Valid To: 2021 Jan 25 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: 2185 Issue Time: 2021 Jan 12 0151 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Jan 12 0151 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: 3804 Issue Time: 2021 Jan 12 0105 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Jan 12 0105 UTC Valid To: 2021 Jan 12 0900 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: 3803 Issue Time: 2021 Jan 11 1754 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3802 Valid From: 2021 Jan 11 1330 UTC Now Valid Until: 2021 Jan 11 2359 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 –