Space Weather Message Code: WARK04 Serial Number: 3341 Issue Time: 2017 Oct 13 1108 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3340 Valid From: 2017 Oct 11 0150 UTC Now Valid Until: 2017 Oct 13 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: ALTK05 Serial Number: 1178 Issue Time: 2017 Oct 13 0601 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 13 0559 UTC Synoptic Period: 0300-0600 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: WARK05 Serial Number: 1419 Issue Time: 2017 Oct 13 0422 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Oct 13 0420 UTC Valid To: 2017 Oct 13 1200 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: 3340 Issue Time: 2017 Oct 12 1817 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3339 Valid From: 2017 Oct 11 0150 UTC Now Valid Until: 2017 Oct 13 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: WARK05 Serial Number: 1418 Issue Time: 2017 Oct 12 1754 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1417 Valid From: 2017 Oct 11 0730 UTC Now Valid Until: 2017 Oct 13 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK05 Serial Number: 1177 Issue Time: 2017 Oct 12 1500 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 12 1459 UTC Synoptic Period: 1200-1500 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: WARK05 Serial Number: 1417 Issue Time: 2017 Oct 12 1044 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1416 Valid From: 2017 Oct 11 0730 UTC Now Valid Until: 2017 Oct 12 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: ALTK05 Serial Number: 1176 Issue Time: 2017 Oct 12 0041 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 12 0040 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: WARK05 Serial Number: 1416 Issue Time: 2017 Oct 11 2357 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1415 Valid From: 2017 Oct 11 0730 UTC Now Valid Until: 2017 Oct 12 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: 1175 Issue Time: 2017 Oct 11 1751 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 11 1748 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.