Space Weather Message Code: ALTK04 Serial Number: 2161 Issue Time: 2020 Aug 04 0455 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Aug 04 0454 UTC Synoptic Period: 0300-0600 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: 3744 Issue Time: 2020 Aug 04 0255 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3743 Valid From: 2020 Aug 03 2107 UTC Now Valid Until: 2020 Aug 04 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: 3743 Issue Time: 2020 Aug 03 2108 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Aug 03 2107 UTC Valid To: 2020 Aug 04 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: ALTK04 Serial Number: 2160 Issue Time: 2020 Aug 03 0254 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Aug 03 0251 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: 3742 Issue Time: 2020 Aug 03 0121 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Aug 03 0120 UTC Valid To: 2020 Aug 03 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: 2159 Issue Time: 2020 Jul 25 2259 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Jul 25 2258 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: 3741 Issue Time: 2020 Jul 25 2256 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Jul 25 2256 UTC Valid To: 2020 Jul 26 0600 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: 2158 Issue Time: 2020 Jul 25 0128 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Jul 25 0120 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: 3740 Issue Time: 2020 Jul 24 2210 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Jul 24 2210 UTC Valid To: 2020 Jul 25 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: 3739 Issue Time: 2020 Jul 24 1642 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Jul 24 1640 UTC Valid To: 2020 Jul 24 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 – Weak power grid fluctuations can occur. Aurora