Space Weather Message Code: ALTK04 Serial Number: 2229 Issue Time: 2021 Aug 02 1744 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Aug 02 1744 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: 3921 Issue Time: 2021 Aug 02 1712 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Aug 02 1715 UTC Valid To: 2021 Aug 02 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: WARK04 Serial Number: 3920 Issue Time: 2021 Jul 28 1922 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Jul 28 1922 UTC Valid To: 2021 Jul 29 0300 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: 2228 Issue Time: 2021 Jul 28 0219 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Jul 28 0218 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: 3919 Issue Time: 2021 Jul 28 0118 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Jul 28 0117 UTC Valid To: 2021 Jul 28 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: 2227 Issue Time: 2021 Jul 22 0901 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Jul 22 0900 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: 3918 Issue Time: 2021 Jul 22 0852 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Jul 22 0851 UTC Valid To: 2021 Jul 22 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: WATA20 Serial Number: 897 Issue Time: 2021 Jul 21 2029 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jul 22: None (Below G1) Jul 23: G1 (Minor) Jul 24: 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: ALTK04 Serial Number: 2226 Issue Time: 2021 Jul 14 1641 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Jul 14 1631 UTC Synoptic Period: 1500-1800 UTC Active Warning: No 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: 3917 Issue Time: 2021 Jul 14 1639 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Jul 14 1639 UTC Valid To: 2021 Jul 15 0300 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