Space Weather Message Code: WARK04 Serial Number: 3553 Issue Time: 2018 Oct 15 0056 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Oct 15 0055 UTC Valid To: 2018 Oct 15 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: 3552 Issue Time: 2018 Oct 13 2347 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3551 Valid From: 2018 Oct 13 1655 UTC Now Valid Until: 2018 Oct 14 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: WATA20 Serial Number: 840 Issue Time: 2018 Oct 13 1828 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 14: G1 (Minor) Oct 15: None (Below G1) Oct 16: None (Below G1) 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: ALTK05 Serial Number: 1248 Issue Time: 2018 Oct 13 1757 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2018 Oct 13 1756 UTC Synoptic Period: 1500-1800 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: 1501 Issue Time: 2018 Oct 13 1716 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2018 Oct 13 1716 UTC Valid To: 2018 Oct 13 2359 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: 2085 Issue Time: 2018 Oct 13 1710 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 Oct 13 1709 UTC Synoptic Period: 1500-1800 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: 3551 Issue Time: 2018 Oct 13 1655 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Oct 13 1655 UTC Valid To: 2018 Oct 13 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: 3550 Issue Time: 2018 Oct 11 0138 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Oct 11 0140 UTC Valid To: 2018 Oct 11 0600 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: ALTK05 Serial Number: 1247 Issue Time: 2018 Oct 10 2032 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2018 Oct 10 2022 UTC Synoptic Period: 1800-2100 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: 1500 Issue Time: 2018 Oct 10 2023 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2018 Oct 10 2022 UTC Valid To: 2018 Oct 10 2300 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