Space Weather Message Code: WARK04 Serial Number: 3683 Issue Time: 2019 Oct 25 0713 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3682 Valid From: 2019 Oct 24 1102 UTC Now Valid Until: 2019 Oct 25 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: ALTK05 Serial Number: 1290 Issue Time: 2019 Oct 25 0707 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Oct 25 0706 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: 1540 Issue Time: 2019 Oct 25 0251 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1539 Valid From: 2019 Oct 24 1600 UTC Now Valid Until: 2019 Oct 25 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: WARK05 Serial Number: 1539 Issue Time: 2019 Oct 24 1600 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2019 Oct 24 1600 UTC Valid To: 2019 Oct 25 0300 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: 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