Space Weather Message Code: ALTK05 Serial Number: 1291 Issue Time: 2019 Oct 26 1159 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Oct 26 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.

Space Weather Message Code: WARK04 Serial Number: 3685 Issue Time: 2019 Oct 26 1124 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3684 Valid From: 2019 Oct 24 1102 UTC Now Valid Until: 2019 Oct 26 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 –

Space Weather Message Code: WARK05 Serial Number: 1543 Issue Time: 2019 Oct 26 1117 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2019 Oct 26 1115 UTC Valid To: 2019 Oct 26 1500 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: WARK04 Serial Number: 3685 Issue Time: 2019 Oct 26 1124 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3684 Valid From: 2019 Oct 24 1102 UTC Now Valid Until: 2019 Oct 26 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 –

Space Weather Message Code: WARK05 Serial Number: 1543 Issue Time: 2019 Oct 26 1117 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2019 Oct 26 1115 UTC Valid To: 2019 Oct 26 1500 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: WARK04 Serial Number: 3684 Issue Time: 2019 Oct 25 1757 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3683 Valid From: 2019 Oct 24 1102 UTC Now Valid Until: 2019 Oct 26 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: ALTK06 Serial Number: 475 Issue Time: 2019 Oct 25 0850 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2019 Oct 25 0849 UTC Synoptic Period: 0600-0900 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: WARK05 Serial Number: 1541 Issue Time: 2019 Oct 25 0722 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1540 Valid From: 2019 Oct 24 1600 UTC Now Valid Until: 2019 Oct 25 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK04 Serial Number: 3683 Issue Time: 2019 Oct 25 0713 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3682 Valid From: 2019 Oct 24 1102 UTC Now Valid Until: 2019 Oct 25 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: WARK05 Serial Number: 1541 Issue Time: 2019 Oct 25 0722 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1540 Valid From: 2019 Oct 24 1600 UTC Now Valid Until: 2019 Oct 25 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 60 degrees Geomagnetic Latitude. Induced Currents –