Space Weather Message Code: ALTK04 Serial Number: 2141 Issue Time: 2020 Jan 09 0904 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Jan 09 0855 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: 3699 Issue Time: 2020 Jan 09 0700 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Jan 09 0700 UTC Valid To: 2020 Jan 09 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: 3698 Issue Time: 2020 Jan 05 2323 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3697 Valid From: 2020 Jan 05 1903 UTC Now Valid Until: 2020 Jan 06 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: 2139 Issue Time: 2019 Dec 18 1435 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Dec 18 1426 UTC Synoptic Period: 1200-1500 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: 3696 Issue Time: 2019 Dec 18 1432 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3695 Valid From: 2019 Dec 18 1153 UTC Now Valid Until: 2019 Dec 19 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: WARK04 Serial Number: 3695 Issue Time: 2019 Dec 18 1153 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Dec 18 1153 UTC Valid To: 2019 Dec 18 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: 3694 Issue Time: 2019 Nov 23 1358 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Nov 23 1400 UTC Valid To: 2019 Nov 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 65 degrees Geomagnetic Latitude. Induced Currents – Weak power grid fluctuations can occur. Aurora

Space Weather Message Code: WARK04 Serial Number: 3693 Issue Time: 2019 Nov 22 0515 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3692 Valid From: 2019 Nov 21 1758 UTC Now Valid Until: 2019 Nov 22 2100 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: 2138 Issue Time: 2019 Nov 21 2247 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Nov 21 2244 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: ALTK04 Serial Number: 2136 Issue Time: 2019 Nov 21 2244 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Nov 21 1544 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