Space Weather Message Code: ALTK04 Serial Number: 2134 Issue Time: 2019 Oct 24 1155 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Oct 24 1155 UTC Synoptic Period: 0900-1200 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: 3681 Issue Time: 2019 Oct 24 1103 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Oct 24 1102 UTC Valid To: 2019 Oct 24 2100 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: WATA20 Serial Number: 865 Issue Time: 2019 Oct 22 2112 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 23: None (Below G1) Oct 24: G1 (Minor) Oct 25: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT 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

Space Weather Message Code: WATA20 Serial Number: 864 Issue Time: 2019 Oct 21 2107 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 22: None (Below G1) Oct 23: None (Below G1) Oct 24: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT 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.

Space Weather Message Code: WARK04 Serial Number: 3680 Issue Time: 2019 Oct 10 0839 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3679 Valid From: 2019 Oct 10 0532 UTC Now Valid Until: 2019 Oct 10 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: ALTK04 Serial Number: 2133 Issue Time: 2019 Oct 10 0547 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Oct 10 0547 UTC Synoptic Period: 0300-0600 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: 3679 Issue Time: 2019 Oct 10 0532 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Oct 10 0532 UTC Valid To: 2019 Oct 10 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: ALTK04 Serial Number: 2132 Issue Time: 2019 Oct 09 1202 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Oct 09 1200 UTC Synoptic Period: 0900-1200 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: 3678 Issue Time: 2019 Oct 09 1013 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Oct 09 1013 UTC Valid To: 2019 Oct 09 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 – Weak power grid fluctuations can occur. Aurora

Space Weather Message Code: WARK04 Serial Number: 3677 Issue Time: 2019 Oct 01 0800 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3676 Valid From: 2019 Oct 01 0257 UTC Now Valid Until: 2019 Oct 01 1500 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 –