Space Weather Message Code: ALTK05 Serial Number: 1278 Issue Time: 2019 Sep 01 0729 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Sep 01 0729 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: ALTK05 Serial Number: 1277 Issue Time: 2019 Sep 01 0450 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Sep 01 0450 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: ALTK05 Serial Number: 1276 Issue Time: 2019 Sep 01 0301 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Sep 01 0259 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: 1530 Issue Time: 2019 Aug 31 2049 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1529 Valid From: 2019 Aug 31 0244 UTC Now Valid Until: 2019 Sep 01 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK06 Serial Number: 473 Issue Time: 2019 Aug 31 1421 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2019 Aug 31 1420 UTC Synoptic Period: 1200-1500 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: ALTK05 Serial Number: 1275 Issue Time: 2019 Aug 31 1228 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Aug 31 1228 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: ALTK05 Serial Number: 1274 Issue Time: 2019 Aug 31 1201 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Aug 31 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: WARK05 Serial Number: 1529 Issue Time: 2019 Aug 31 1026 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1528 Valid From: 2019 Aug 31 0244 UTC Now Valid Until: 2019 Aug 31 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK05 Serial Number: 1273 Issue Time: 2019 Aug 31 1016 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Aug 31 1015 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: 1272 Issue Time: 2019 Aug 31 0549 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Aug 31 0546 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.