Space Weather Message Code: ALTK04 Serial Number: 2131 Issue Time: 2019 Oct 01 0301 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Oct 01 0259 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes 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 – Aurora may be

Space Weather Message Code: WARK04 Serial Number: 3676 Issue Time: 2019 Oct 01 0258 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Oct 01 0257 UTC Valid To: 2019 Oct 01 0900 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: 3675 Issue Time: 2019 Sep 30 0539 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Sep 30 0538 UTC Valid To: 2019 Sep 30 1800 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: ALTK04 Serial Number: 2129 Issue Time: 2019 Sep 30 0002 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Sep 29 2359 UTC Synoptic Period: 2100-2359 UTC Active Warning: Yes 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 – Aurora may be

Space Weather Message Code: WARK04 Serial Number: 3674 Issue Time: 2019 Sep 29 1952 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Sep 29 1951 UTC Valid To: 2019 Sep 29 2359 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: 3673 Issue Time: 2019 Sep 28 1951 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3672 Valid From: 2019 Sep 27 1000 UTC Now Valid Until: 2019 Sep 29 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 –

Space Weather Message Code: ALTK05 Serial Number: 1288 Issue Time: 2019 Sep 28 1201 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Sep 28 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: ALTK05 Serial Number: 1287 Issue Time: 2019 Sep 28 0847 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Sep 28 0845 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: WARK05 Serial Number: 1537 Issue Time: 2019 Sep 28 0846 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1536 Valid From: 2019 Sep 27 1630 UTC Now Valid Until: 2019 Sep 28 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: 1286 Issue Time: 2019 Sep 28 0445 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Sep 27 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.