Space Weather Message Code: ALTK04 Serial Number: 2072 Issue Time: 2018 Aug 25 2143 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 Aug 25 2143 UTC Synoptic Period: 2100-2400 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: 3517 Issue Time: 2018 Aug 25 2109 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Aug 25 2109 UTC Valid To: 2018 Aug 26 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: ALTK04 Serial Number: 2071 Issue Time: 2018 Aug 20 1923 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 Aug 20 1923 UTC Synoptic Period: 1800-2100 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: 3516 Issue Time: 2018 Aug 20 1920 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Aug 20 1919 UTC Valid To: 2018 Aug 21 0000 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: 2070 Issue Time: 2018 Aug 20 0300 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 Aug 20 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: 3515 Issue Time: 2018 Aug 20 0036 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Aug 20 0036 UTC Valid To: 2018 Aug 20 1400 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: 2069 Issue Time: 2018 Aug 18 0809 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 Aug 18 0808 UTC Synoptic Period: 0600-0900 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: 3514 Issue Time: 2018 Aug 18 0559 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Aug 18 0600 UTC Valid To: 2018 Aug 18 1200 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: 2068 Issue Time: 2018 Aug 17 0413 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 Aug 17 0412 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: 3513 Issue Time: 2018 Aug 17 0345 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Aug 17 0345 UTC Valid To: 2018 Aug 17 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