Space Weather Message Code: WARK04 Serial Number: 4086 Issue Time: 2022 Apr 17 0208 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 17 0205 UTC Valid To: 2022 Apr 17 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: 4085 Issue Time: 2022 Apr 15 1416 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4084 Valid From: 2022 Apr 14 0110 UTC Now Valid Until: 2022 Apr 16 0600 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: WARK05 Serial Number: 1661 Issue Time: 2022 Apr 15 0255 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1660 Valid From: 2022 Apr 14 1048 UTC Now Valid Until: 2022 Apr 15 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK05 Serial Number: 1385 Issue Time: 2022 Apr 15 0212 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Apr 15 0208 UTC Synoptic Period: 0000-0300 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: ALTK05 Serial Number: 1384 Issue Time: 2022 Apr 14 1937 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Apr 14 1933 UTC Synoptic Period: 1800-2100 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: ALTK06 Serial Number: 495 Issue Time: 2022 Apr 14 1649 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2022 Apr 14 1645 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G2 – Moderate 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 – Power grid fluctuations can occur. High-latitude

Space Weather Message Code: WARK06 Serial Number: 457 Issue Time: 2022 Apr 14 1630 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2022 Apr 14 1630 UTC Valid To: 2022 Apr 14 2359 UTC Warning Condition: Onset NOAA Scale: G2 – Moderate 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 – Power grid

Space Weather Message Code: ALTK05 Serial Number: 1383 Issue Time: 2022 Apr 14 1612 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Apr 14 1610 UTC Synoptic Period: 1500-1800 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: WARK04 Serial Number: 4083 Issue Time: 2022 Apr 14 1449 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4082 Valid From: 2022 Apr 14 0110 UTC Now Valid Until: 2022 Apr 15 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: ALTK05 Serial Number: 1382 Issue Time: 2022 Apr 14 1201 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Apr 14 1159 UTC Synoptic Period: 0900-1200 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.