Alerts:
Space Weather Message Code: WARK07
Serial Number: 144
Issue Time: 2026 Jan 21 1056 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 143
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 1800 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: WARK05
Serial Number: 2178
Issue Time: 2026 Jan 21 1056 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2177
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 22 1500 UTC
Warning Condition: Persistence
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: WARK06
Serial Number: 637
Issue Time: 2026 Jan 21 1056 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 636
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 2359 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: WARK04
Serial Number: 5229
Issue Time: 2026 Jan 21 1056 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5228
Valid From: 2026 Jan 16 0254 UTC
Now Valid Until: 2026 Jan 22 1800 UTC
Warning Condition: Persistence
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 visible at high latitudes such as Canada and Alaska.
Space Weather Message Code: ALTK06
Serial Number: 695
Issue Time: 2026 Jan 21 1037 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: ALTEF3
Serial Number: 3606
Issue Time: 2026 Jan 21 1006 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 Jan 21 0950 UTC
Station: GOES19
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Space Weather Message Code: ALTK05
Serial Number: 1960
Issue Time: 2026 Jan 21 0948 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: ALTK07
Serial Number: 211
Issue Time: 2026 Jan 21 0853 UTC
ALERT: Geomagnetic K-index of 7
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: WATA20
Serial Number: 1090
Issue Time: 2026 Jan 21 0731 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Jan 22: G1 (Minor) Jan 23: None (Below G1) Jan 24: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: ALTK06
Serial Number: 694
Issue Time: 2026 Jan 21 0727 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: ALTK05
Serial Number: 1959
Issue Time: 2026 Jan 21 0710 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: ALTK07
Serial Number: 210
Issue Time: 2026 Jan 21 0511 UTC
ALERT: Geomagnetic K-index of 7
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: ALTK06
Serial Number: 693
Issue Time: 2026 Jan 21 0447 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: ALTK05
Serial Number: 1958
Issue Time: 2026 Jan 21 0354 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: ALTK07
Serial Number: 209
Issue Time: 2026 Jan 21 0220 UTC
ALERT: Geomagnetic K-index of 7
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: WARK06
Serial Number: 636
Issue Time: 2026 Jan 21 0201 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 635
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 1500 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: WARK07
Serial Number: 143
Issue Time: 2026 Jan 21 0201 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 142
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 1200 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: WARK05
Serial Number: 2177
Issue Time: 2026 Jan 21 0201 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2176
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 1800 UTC
Warning Condition: Persistence
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: WARK04
Serial Number: 5228
Issue Time: 2026 Jan 21 0201 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5227
Valid From: 2026 Jan 16 0254 UTC
Now Valid Until: 2026 Jan 21 2100 UTC
Warning Condition: Persistence
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 visible at high latitudes such as Canada and Alaska.
Space Weather Message Code: SUMPX2
Serial Number: 59
Issue Time: 2026 Jan 21 0155 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2026 Jan 19 0440 UTC
Maximum Time: 2026 Jan 19 1915 UTC
End Time: 2026 Jan 20 1335 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
www.swpc.noaa.gov/noaa-scales-explanation
Space Weather Message Code: ALTK06
Serial Number: 692
Issue Time: 2026 Jan 21 0035 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: ALTK05
Serial Number: 1957
Issue Time: 2026 Jan 21 0028 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: ALTK08
Serial Number: 59
Issue Time: 2026 Jan 21 0008 UTC
ALERT: Geomagnetic K-index of 8, 9-
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.
Space Weather Message Code: WARPX1
Serial Number: 621
Issue Time: 2026 Jan 20 2355 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 620
Valid From: 2026 Jan 18 2130 UTC
Now Valid Until: 2026 Jan 21 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.
Space Weather Message Code: ALTK07
Serial Number: 208
Issue Time: 2026 Jan 20 2242 UTC
ALERT: Geomagnetic K-index of 7
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: ALTK06
Serial Number: 691
Issue Time: 2026 Jan 20 2233 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: ALTK05
Serial Number: 1956
Issue Time: 2026 Jan 20 2135 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: WARK05
Serial Number: 2176
Issue Time: 2026 Jan 20 1953 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2175
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 0900 UTC
Warning Condition: Persistence
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: WARK04
Serial Number: 5227
Issue Time: 2026 Jan 20 1953 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5226
Valid From: 2026 Jan 16 0254 UTC
Now Valid Until: 2026 Jan 21 1500 UTC
Warning Condition: Persistence
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 visible at high latitudes such as Canada and Alaska.
Space Weather Message Code: WARK07
Serial Number: 142
Issue Time: 2026 Jan 20 1953 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 141
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 0300 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: WARK06
Serial Number: 635
Issue Time: 2026 Jan 20 1953 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 634
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 0600 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: ALTK07
Serial Number: 207
Issue Time: 2026 Jan 20 1949 UTC
ALERT: Geomagnetic K-index of 7
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: ALTK06
Serial Number: 690
Issue Time: 2026 Jan 20 1856 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: ALTK05
Serial Number: 1955
Issue Time: 2026 Jan 20 1823 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: ALTK07
Serial Number: 206
Issue Time: 2026 Jan 20 1727 UTC
ALERT: Geomagnetic K-index of 7
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: ALTK06
Serial Number: 689
Issue Time: 2026 Jan 20 1530 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: ALTK05
Serial Number: 1954
Issue Time: 2026 Jan 20 1519 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Space Weather Message Code: WARK06
Serial Number: 634
Issue Time: 2026 Jan 20 1456 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 633
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 20 2359 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: WARK07
Serial Number: 141
Issue Time: 2026 Jan 20 1456 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 140
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 20 2100 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: ALTK07
Serial Number: 205
Issue Time: 2026 Jan 20 1248 UTC
ALERT: Geomagnetic K-index of 7
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Space Weather Message Code: ALTK06
Serial Number: 688
Issue Time: 2026 Jan 20 1229 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Solar-terrestrial indices for 20 January follow.
Solar flux 178 and estimated planetary A-index 143.
The estimated planetary K-index at 1200 UTC on 21 January was 6.33.
Space weather for the past 24 hours has been severe.
Geomagnetic storms reaching the G4 level occurred.
Solar radiation storms reaching the S2 level occurred.
Radio blackouts reaching the R1 level occurred.
Space weather for the next 24 hours is predicted to be severe.
Geomagnetic storms reaching the G4 level are expected.
Solar radiation storms reaching the S1 level are expected.
Radio blackouts reaching the R2 level are likely.
Geo Magnetic Forecast:
NOAA Ap Index Forecast
Observed Ap 19 Jan 073
Estimated Ap 20 Jan 125
Predicted Ap 21 Jan-23 Jan 042-018-010
NOAA Geomagnetic Activity Probabilities 21 Jan-23 Jan
Active 01/40/20
Minor storm 15/20/10
Moderate storm 30/10/01
Strong-Extreme storm 55/01/01
NOAA Kp index forecast 21 Jan - 23 Jan
Jan 21 Jan 22 Jan 23
00-03UT 6.67 4.00 2.67
03-06UT 5.67 3.33 2.67
06-09UT 5.00 3.00 2.33
09-12UT 4.33 2.67 2.33
12-15UT 4.00 3.00 2.33
15-18UT 3.33 3.00 2.33
18-21UT 3.00 3.33 2.33
21-00UT 3.00 3.67 2.00
Extended Three Day Forecast:
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 8 (NOAA Scale
G4).
The greatest expected 3 hr Kp for Jan 21-Jan 23 2026 is 6.67 (NOAA Scale
G3).
NOAA Kp index breakdown Jan 21-Jan 23 2026
Jan 21 Jan 22 Jan 23
00-03UT 6.67 (G3) 4.00 2.67
03-06UT 6.67 (G3) 3.33 2.67
06-09UT 5.67 (G2) 3.00 2.33
09-12UT 5.67 (G2) 2.67 2.33
12-15UT 4.67 (G1) 3.00 2.33
15-18UT 4.67 (G1) 3.00 2.33
18-21UT 3.67 3.33 2.33
21-00UT 3.67 3.67 2.00
Rationale: G1-G3 (Minor-Strong) geomagnetic storms are anticipated on
20-21 Jan due to continuing CH HSS influence and the passage of a halo
CME that arrived late on 19 Jan.
B. NOAA Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
above S-scale storm level thresholds.
Solar Radiation Storm Forecast for Jan 21-Jan 23 2026
Jan 21 Jan 22 Jan 23
S1 or greater 99% 45% 15%
Rationale: S1 (Minor) or greater solar radiation storms are expected to
continue through 21 Jan, with the possibility of another crossing or
slow decay keeping 22-23 Jan probabilities elevated.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Jan 21-Jan 23 2026
Jan 21 Jan 22 Jan 23
R1-R2 60% 60% 60%
R3 or greater 15% 15% 15%
Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for R3 (Strong) events, on 21-23 Jan.
Extended Space Weather Discussion:
Solar Activity
.24 hr Summary...
Solar activity reached moderate levels with two M-class flares: an
M1.1/SF at 21/0135 UTC from Region 4345 (S17W15, Eai/beta-gamma) and an
M3.4/1B at 21/0712 from Region 4349 (S15E51, Cso/beta). Region 4345
continued to show constant flux emergence in its intermediary region, as
well as region Region 4342 (N14W17, Dai/beta-gamma-delta) to a lesser
extent. Regions 4343 (S11W70, Hrx/alpha) and 4350 (N21E31, Axx/alpha)
have nearly decayed entirely to plage. All remaining regions were either
stable or showed only minor change.
Coronagraph imagery is largely cleared of contamination by solar
energetic particles, complicating detection of potential Earth-directed
eruptions. A filament erupted off the NW limb starting at 21/0745 UTC,
with clear fieldline movement visible in SDO/AIA 304 and 284, the later
suggesting a slight northward deflection; however, analysis is waiting
on sufficient imagery.
.Forecast...
Solar activity is likely (60%) to be at moderate (R1/R2, Minor/Moderate)
levels, with a slight chance (15%) for X-class flares (R3-Strong) on
21-23 Jan, primarily due to the magnetic potential of Regions 4342 and
4345.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux reached high levels briefly,
crossing the 1,000 pfu threshold at 21/0950 UTC and reaching a peak of
3,330 pfu at 21/1005 UTC.
The greater than 10 MeV proton flux remained largely at S1 (Minor)
levels during the reporting period, with an isolated brief interval at
20/1245 enhanced above S2 (Moderate).
.Forecast...
The greater than 2 MeV electron flux is expected to reach high levels on
21-23 Jan. The greater than 10 MeV proton flux is expected to gradually
decrease below the S1 (Minor) threshold on 21-22 Jan, with a slight
chance (15%) of another crossing on 23 Jan.
Solar Wind
.24 hr Summary...
Solar wind parameters reflected CME influence transitioning into a
high-speed stream paradigm, with the interplanetary magnetic field
returned to largely enhanced background levels. The total magnetic field
strength (Bt) was largely below 20 nT with an overall downward trend,
ending the reporting period at 8 nT. The Bz (north-south) component
remained predominantly southward/negative, averaging ~-10 nT during the
first half of the reporting period and then maintaining ~-5 nT for the
second half. Solar wind speeds remained high but steadily decreased from
~950 km/s to ~650 km/s. Phi angle was oriented in the positive solar
sector (away from the Sun).
.Forecast...
Enhanced solar wind conditions are expected to persist but slowly
decrease on 21-23 Jan as influences from the coronal hole high speed
stream continue to move through the near-Earth environment.
Geospace
.24 hr Summary...
Geomagnetic activity ranged from Moderate (G2) to Severe (G4) storm
levels due to combined influences of +CH HSS and a Halo CME arrival.
.Forecast...
The geomagnetic activity is expected to range from active to Strong (G3)
storming levels on 21 Jan as the combined influence from the
aforementioned +CH HSS and Halo CME effects persist. Minor (G1) storming
levels are anticipated on 22 Jan, with largely active conditions
expected on 23 Jan, with a chance (20%) of isolated G1 storming, as
influence from the positive polarity CH HSS begins to wane.
27 Day Forecast:
Date | Radio Flux | Planetary A Index | Largest Kp Index
2026 Jan 19 160 20 4
2026 Jan 20 165 16 4
2026 Jan 21 170 10 3
2026 Jan 22 175 8 3
2026 Jan 23 180 8 3
2026 Jan 24 180 5 2
2026 Jan 25 175 5 2
2026 Jan 26 170 5 2
2026 Jan 27 165 10 3
2026 Jan 28 160 15 4
2026 Jan 29 165 25 5
2026 Jan 30 165 12 4
2026 Jan 31 160 10 3
2026 Feb 01 155 5 2
2026 Feb 02 150 5 2
2026 Feb 03 145 5 2
2026 Feb 04 140 15 4
2026 Feb 05 130 12 4
2026 Feb 06 120 10 3
2026 Feb 07 125 8 3
2026 Feb 08 130 8 3
2026 Feb 09 135 10 3
2026 Feb 10 140 8 3
2026 Feb 11 135 8 3
2026 Feb 12 135 5 2
2026 Feb 13 135 20 4
2026 Feb 14 140 15 4
v4.16b
v4.X Release 17th Dec 2020)
Fixed New GOES and HPI inputs from noaa for Json (17/12/20).
Addded the ability to add 2 custom Magnetometers in settings (comming soon) (18/10/19).
Improved Hobart Magnetometer code. (18/18/19)
Move all presets into their own pop out side menu. (19/06/19)
Added Composite weather maps (TAS, VIC and SA), thanks to Oz forecast! (19/06/19)
UI Upgrades, Name, Logo and Website Site Changes.
Added custom line widths for most items.
Added GOES Difference (#1 - #2)
Added Ovation-prime model outputs.
v3.8x
Various Updates, New AF Index Algo. (8/12/18)
v3.6x
Added more Presets. Disabled Presets overwriting graph views (6/7/18)
Added GeoSpace Kp Model Prediction. (3/7/18)
Added SWPC Kp Forecast + Observation. (2/7/18)
Removed WingKP and USKp. :( No longer Avaliable. (2/7/18)
Removed feed from www.dunedinaurora.nz (Unreliable). (2/7/18)
Updates to latest JQuery, JQuery Mobile and AmCharts etc. (2/7/18)
Enhanced Pro setting with Dynamic Preasure. (2/7/18)
Added Quickselect preset buttons to main page. (2/7/18)
v3.5x
Added Ruru Observatory Magnetometer. (25/4/28)
Added Forecast Sub Tabset. (1/3/18)
Added Extended Discussion Text, 27Day FC (1/3/18)
Removed Dial, and Added Forecast Report. (28/2/18)
Updated A few settings for better visilation. (28/2/18)
Updated Goes-13 is Now Goes-14 (15/2/18)
Improved Commmunity Activity for faster loads.
Consolidated Proton Density / Dynamic Preasure.
Added Additional Balloon Text.
Added TAFS Visual Probability in %.
User Interface Upgrades.
Add 'Dial' for the basics, with default support.
Added one click presets.
v2.1 - v2.49
Added 'Automatic Chart Update' option in settings.
Database caching enabled, significant load time improvements.
Extension to max 96 hours of data, up from 24.
Added ACE Bt,Bx and By for comparison.
Added More User Presets.
Fixed Orentation Change Alert.
Small layout changes.
Added Header Image.
Removed Top Header to fee up Space, Refresh added to Chart Tab.
Added Community Activity Indicator
Fixed MAG value issues in graph.
Added Second Hobart MAG Source.
Updated Comment Features (Disable).
v2.0
Fixed DSCOVR B? display bug.
Added MAG Stack Feature.
Upgrade to json feeds.
Feeds are timezone and forecast aware, making them super fast.
DB Optimisation, improved DB search times.
Charts are now zoomable, allow selection and export.
Added USAF Kp, Updated Wing Kp.
Added Ovation Aurora Short Term Forecast.
Added Macquarie Island MAG feed.
Added Mawson MAG Feed.
Added Canberra Feed.
Added MAG feed from www.dunedinaurora.nz (Portobello).
Added Brendan's experemental MAG feed (Hobart).
Fixed cookie bug, One Alert is enough for landscape mode.
> v1.0 (Started 20/10/2014)
Mawson and Macquarie Island data is copyright Commonwealth of Australia (Geoscience Australia), and redistributed under Creative Commons v4.
Thanks to INTERMAGNET for promoting high standards of magnetic observatory practice in providing access to these feeds. (www.intermagnet.org).
Local Australian weather composite maps provided by Oz Forecast