Space Weather Message Code: ALTK05 Serial Number: 1187 Issue Time: 2017 Oct 15 1501 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 15 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: 1426 Issue Time: 2017 Oct 15 1411 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Oct 15 1410 UTC Valid To: 2017 Oct 15 2100 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: 3346 Issue Time: 2017 Oct 15 0525 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3345 Valid From: 2017 Oct 11 0150 UTC Now Valid Until: 2017 Oct 15 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: WARK06 Serial Number: 410 Issue Time: 2017 Oct 15 0513 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2017 Oct 15 0513 UTC Valid To: 2017 Oct 15 0900 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: 1186 Issue Time: 2017 Oct 15 0439 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 15 0439 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: 1425 Issue Time: 2017 Oct 15 0431 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Oct 15 0430 UTC Valid To: 2017 Oct 15 0900 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: 3345 Issue Time: 2017 Oct 14 1432 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3344 Valid From: 2017 Oct 11 0150 UTC Now Valid Until: 2017 Oct 15 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: ALTK05 Serial Number: 1185 Issue Time: 2017 Oct 14 1012 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 14 1008 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: ALTK05 Serial Number: 1184 Issue Time: 2017 Oct 14 0901 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 14 0859 UTC Synoptic Period: 0600-0900 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: WARK06 Serial Number: 409 Issue Time: 2017 Oct 14 0255 UTC EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 408 Valid From: 2017 Oct 13 1446 UTC Now Valid Until: 2017 Oct 14 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 55 degrees Geomagnetic Latitude. Induced Currents –