Space Weather Message Code: ALTK04 Serial Number: 2153 Issue Time: 2020 Apr 04 0001 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Apr 03 2359 UTC Synoptic Period: 2100-0000 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: 3721 Issue Time: 2020 Apr 03 2246 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Apr 03 2245 UTC Valid To: 2020 Apr 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: WARK04 Serial Number: 3720 Issue Time: 2020 Mar 31 1755 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3719 Valid From: 2020 Mar 30 1745 UTC Now Valid Until: 2020 Apr 01 0300 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: 3719 Issue Time: 2020 Mar 31 0726 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3718 Valid From: 2020 Mar 30 1745 UTC Now Valid Until: 2020 Mar 31 1800 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: 3718 Issue Time: 2020 Mar 31 0014 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3717 Valid From: 2020 Mar 30 1745 UTC Now Valid Until: 2029 Mar 31 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: WARK04 Serial Number: 3717 Issue Time: 2020 Mar 30 1745 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Mar 30 1745 UTC Valid To: 2020 Mar 31 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: 3716 Issue Time: 2020 Mar 23 0440 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Mar 23 0439 UTC Valid To: 2020 Mar 23 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: 2151 Issue Time: 2020 Mar 19 0130 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Mar 19 0130 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: 3715 Issue Time: 2020 Mar 19 0128 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Mar 19 0127 UTC Valid To: 2020 Mar 19 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: ALTK04 Serial Number: 2150 Issue Time: 2020 Feb 29 2225 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Feb 29 2223 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