Space weather

Solar wind speed Solar wind magnetic fields Noon 10.7cm radio flux
Bt Bz

Update

Update

Update
EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 29.11.2021 02.56 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3976
Valid From: 2021 Nov 28 2225 UTC
Now Valid Until: 2021 Nov 29 0900 UTC
Warning Condition: persistence

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.

ALERT
Geomagnetic K-index of 4
Issued: 29.11.2021 02.56 UTC
Geomagnetic K-index of 4
Threshold Reached: 2021 Nov 29 0247 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 28.11.2021 22.24 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 28 2225 UTC
Valid To: 2021 Nov 29 0300 UTC
Warning Condition: Onset

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 28.11.2021 08.52 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3974
Valid From: 2021 Nov 27 2300 UTC
Now Valid Until: 2021 Nov 28 1500 UTC
Warning Condition: Onset

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 28.11.2021 02.37 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3973
Valid From: 2021 Nov 27 2300 UTC
Now Valid Until: 2021 Nov 28 0900 UTC
Warning Condition: Onset

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 27.11.2021 23.01 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 27 2300 UTC
Valid To: 2021 Nov 28 0300 UTC
Warning Condition: Onset

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.

ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 26.11.2021 13.54 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2021 Nov 26 1310 UTC
Station: GOES16


Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 24.11.2021 13.16 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3168
Begin Time: 2021 Nov 23 1650 UTC
Yesterday Maximum 2MeV Flux: 1094 pfu

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 23.11.2021 16.51 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2021 Nov 23 1650 UTC
Station: GOES


Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 22.11.2021 05.35 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3971
Valid From: 2021 Nov 22 0130 UTC
Now Valid Until: 2021 Nov 22 1200 UTC
Warning Condition: Onset

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 22.11.2021 01.30 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 22 0130 UTC
Valid To: 2021 Nov 22 0600 UTC
Warning Condition: Onset

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 20.11.2021 17.28 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 20 1727 UTC
Valid To: 2021 Nov 21 0900 UTC
Warning Condition: Onset

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 17.11.2021 11.11 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 17 1111 UTC
Valid To: 2021 Nov 17 1500 UTC
Warning Condition: Onset

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.

ALERT
Geomagnetic K-index of 4
Issued: 17.11.2021 02.47 UTC
Geomagnetic K-index of 4
Threshold Reached: 2021 Nov 17 0245 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 17.11.2021 02.36 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 17 0236 UTC
Valid To: 2021 Nov 17 0900 UTC
Warning Condition: Onset

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 16.11.2021 05.50 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3966
Valid From: 2021 Nov 15 2059 UTC
Now Valid Until: 2021 Nov 16 1200 UTC
Warning Condition: Persistence

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.

ALERT
Geomagnetic K-index of 4
Issued: 15.11.2021 21.04 UTC
Geomagnetic K-index of 4
Threshold Reached: 2021 Nov 15 2100 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 15.11.2021 21.02 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 15 2059 UTC
Valid To: 2021 Nov 16 0600 UTC
Warning Condition: Onset

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.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 15.11.2021 14.13 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3166
Begin Time: 2021 Nov 13 2025 UTC
Yesterday Maximum 2MeV Flux: 1600 pfu

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 14.11.2021 12.57 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3165
Begin Time: 2021 Nov 13 2025 UTC
Yesterday Maximum 2MeV Flux: 1185 pfu

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 13.11.2021 20.50 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2021 Nov 13 2025 UTC
Station: GOES-16


Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

WARNING
Geomagnetic K-index of 4 expected
Issued: 10.11.2021 02.42 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 10 0242 UTC
Valid To: 2021 Nov 10 0900 UTC
Warning Condition: Onset

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.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 9.11.2021 11.11 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3163
Begin Time: 2021 Nov 05 1425 UTC
Yesterday Maximum 2MeV Flux: 3320 pfu

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 8.11.2021 08.02 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3162
Begin Time: 2021 Nov 05 1425 UTC
Yesterday Maximum 2MeV Flux: 1939 pfu

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 7.11.2021 06.08 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3161
Begin Time: 2021 Nov 05 1425 UTC
Yesterday Maximum 2MeV Flux: 2059 pfu

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

ALERT
Geomagnetic K-index of 4
Issued: 7.11.2021 02.00 UTC
Geomagnetic K-index of 4
Threshold Reached: 2021 Nov 07 0200 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 7.11.2021 01.51 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 07 0150 UTC
Valid To: 2021 Nov 07 1200 UTC
Warning Condition: Onset

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.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 6.11.2021 18.34 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3160
Begin Time: 2021 Nov 05 1425 UTC
Yesterday Maximum 2MeV Flux: 1818 pfu

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 6.11.2021 17.55 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3962
Valid From: 2021 Nov 05 0517 UTC
Now Valid Until: 2021 Nov 06 2359 UTC
Warning Condition: Persistence

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 6.11.2021 11.48 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3961
Valid From: 2021 Nov 05 0517 UTC
Now Valid Until: 2021 Nov 06 1800 UTC
Warning Condition: Persistence

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 5.11.2021 20.46 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3960
Valid From: 2021 Nov 05 0517 UTC
Now Valid Until: 2021 Nov 06 1200 UTC
Warning Condition: Onset

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.

ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 5.11.2021 15.02 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2021 Nov 05 1425 UTC
Station: GOES-16


Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 5.11.2021 11.57 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3959
Valid From: 2021 Nov 05 0517 UTC
Now Valid Until: 2021 Nov 05 2100 UTC
Warning Condition: Onset

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.

ALERT
Geomagnetic K-index of 4
Issued: 5.11.2021 06.03 UTC
Geomagnetic K-index of 4
Threshold Reached: 2021 Nov 05 0559 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 5.11.2021 05.17 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 05 0517 UTC
Valid To: 2021 Nov 05 1200 UTC
Warning Condition: Onset

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.

ALERT
Geomagnetic K-index of 6
Issued: 4.11.2021 14.53 UTC
Geomagnetic K-index of 6
Threshold Reached: 2021 Nov 04 1439 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Issued: 4.11.2021 14.35 UTC
Geomagnetic K-Index of 6 expected
Extension to Serial Number: 449
Valid From: 2021 Nov 03 2135 UTC
Now Valid Until: 2021 Nov 04 1800 UTC
Warning Condition: Persistence

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.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 4.11.2021 14.13 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1619
Valid From: 2021 Nov 03 2005 UTC
Now Valid Until: 2021 Nov 04 2100 UTC
Warning Condition: Persistence

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 4.11.2021 14.12 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3957
Valid From: 2021 Nov 03 2005 UTC
Now Valid Until: 2021 Nov 05 0300 UTC
Warning Condition: Persistence

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.

ALERT
Geomagnetic K-index of 5
Issued: 4.11.2021 13.31 UTC
Geomagnetic K-index of 5
Threshold Reached: 2021 Nov 04 1328 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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.

ALERT
Geomagnetic K-index of 7
Issued: 4.11.2021 09.34 UTC
Geomagnetic K-index of 7
Threshold Reached: 2021 Nov 04 0934 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

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.

ALERT
Geomagnetic K-index of 6
Issued: 4.11.2021 09.27 UTC
Geomagnetic K-index of 6
Threshold Reached: 2021 Nov 04 0926 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

ALERT
Geomagnetic K-index of 5
Issued: 4.11.2021 09.26 UTC
Geomagnetic K-index of 5
Threshold Reached: 2021 Nov 04 0925 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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.

ALERT
Geomagnetic K-index of 7
Issued: 4.11.2021 08.48 UTC
Geomagnetic K-index of 7
Threshold Reached: 2021 Nov 04 0848 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

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.

EXTENDED WARNING
Geomagnetic K-index of 7 or greater expected
Issued: 4.11.2021 08.48 UTC
Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 80
Valid From: 2021 Nov 03 2204 UTC
Now Valid Until: 2021 Nov 04 1500 UTC
Warning Condition: Persistence

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.

ALERT
Geomagnetic K-index of 6
Issued: 4.11.2021 07.33 UTC
Geomagnetic K-index of 6
Threshold Reached: 2021 Nov 04 0730 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

ALERT
Geomagnetic K-index of 5
Issued: 4.11.2021 07.11 UTC
Geomagnetic K-index of 5
Threshold Reached: 2021 Nov 04 0708 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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.

CANCEL WARNING
Proton 10MeV Integral Flux above 10pfu expected
Issued: 4.11.2021 06.45 UTC
Proton 10MeV Integral Flux above 10pfu expected
Cancel Serial Number: 481
Original Issue Time: 2021 Nov 03 2102 UTC

Comment: Conditions no longer meet warning criteria.

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

ALERT
Geomagnetic K-index of 5
Issued: 4.11.2021 04.26 UTC
Geomagnetic K-index of 5
Threshold Reached: 2021 Nov 04 0424 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 4.11.2021 02.44 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3956
Valid From: 2021 Nov 03 2005 UTC
Now Valid Until: 2021 Nov 04 1500 UTC
Warning Condition: Persistence

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.

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Issued: 4.11.2021 02.44 UTC
Geomagnetic K-Index of 6 expected
Extension to Serial Number: 448
Valid From: 2021 Nov 03 2135 UTC
Now Valid Until: 2021 Nov 04 1500 UTC
Warning Condition: Persistence

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.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 4.11.2021 02.44 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1618
Valid From: 2021 Nov 03 2005 UTC
Now Valid Until: 2021 Nov 04 1500 UTC
Warning Condition: Persistence

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.

EXTENDED WARNING
Geomagnetic K-index of 7 or greater expected
Issued: 4.11.2021 02.44 UTC
Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 79
Valid From: 2021 Nov 03 2204 UTC
Now Valid Until: 2021 Nov 04 0900 UTC
Warning Condition: Persistence

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.

ALERT
Geomagnetic K-index of 6
Issued: 4.11.2021 01.54 UTC
Geomagnetic K-index of 6
Threshold Reached: 2021 Nov 04 0154 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

ALERT
Geomagnetic K-index of 5
Issued: 4.11.2021 01.22 UTC
Geomagnetic K-index of 5
Threshold Reached: 2021 Nov 04 0120 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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.

ALERT
Geomagnetic K-index of 7
Issued: 4.11.2021 00.01 UTC
Geomagnetic K-index of 7
Threshold Reached: 2021 Nov 03 2359 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

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.

ALERT
Geomagnetic K-index of 6
Issued: 3.11.2021 22.05 UTC
Geomagnetic K-index of 6
Threshold Reached: 2021 Nov 03 2146 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

WARNING
Geomagnetic K-index of 7 or greater expected
Issued: 3.11.2021 22.05 UTC
Geomagnetic K-index of 7 or greater expected
Valid From: 2021 Nov 03 2204 UTC
Valid To: 2021 Nov 04 0300 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater - Strong to Extreme

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.

ALERT
Geomagnetic K-index of 5
Issued: 3.11.2021 21.38 UTC
Geomagnetic K-index of 5
Threshold Reached: 2021 Nov 03 2124 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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.

WARNING
Geomagnetic K-Index of 6 expected
Issued: 3.11.2021 21.34 UTC
Geomagnetic K-Index of 6 expected
Valid From: 2021 Nov 03 2135 UTC
Valid To: 2021 Nov 04 0300 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

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.

ALERT
Geomagnetic K-index of 4
Issued: 3.11.2021 21.09 UTC
Geomagnetic K-index of 4
Threshold Reached: 2021 Nov 03 2100 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

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.

WARNING
Proton 10MeV Integral Flux above 10pfu expected
Issued: 3.11.2021 21.02 UTC
Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2021 Nov 03 2101 UTC
Valid To: 2021 Nov 04 1200 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

WARNING
Geomagnetic K-index of 5 expected
Issued: 3.11.2021 20.02 UTC
Geomagnetic K-index of 5 expected
Valid From: 2021 Nov 03 2005 UTC
Valid To: 2021 Nov 04 0600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

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.

SUMMARY
Geomagnetic Sudden Impulse
Issued: 3.11.2021 19.57 UTC
Geomagnetic Sudden Impulse
Observed: 2021 Nov 03 1957 UTC
Deviation: 21 nT
Station: FRD

WARNING
Geomagnetic K-index of 4 expected
Issued: 3.11.2021 19.52 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 03 2005 UTC
Valid To: 2021 Nov 04 0600 UTC
Warning Condition: Onset

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.

WARNING
Geomagnetic Sudden Impulse expected
Issued: 3.11.2021 19.49 UTC
Geomagnetic Sudden Impulse expected
Valid From: 2021 Nov 04 2005 UTC
Valid To: 2021 Nov 04 2105 UTC
IP Shock Passage Observed: 2021 Nov 04 1942 UTC

WATCH
Geomagnetic Storm Category G2 Predicted
Issued: 3.11.2021 13.18 UTC
Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Nov 04: G2 (Moderate) Nov 05: None (Below G1) Nov 06: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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.

WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 2.11.2021 19.02 UTC
Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Nov 03: G1 (Minor) Nov 04: G1 (Minor) Nov 05: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2.11.2021 05.26 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3954
Valid From: 2021 Nov 01 2135 UTC
Now Valid Until: 2021 Nov 02 1800 UTC
Warning Condition: Persistence

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.

WARNING
Geomagnetic K-index of 5 expected
Issued: 2.11.2021 05.21 UTC
Geomagnetic K-index of 5 expected
Valid From: 2021 Nov 02 0521 UTC
Valid To: 2021 Nov 02 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

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.

SUMMARY
10cm Radio Burst
Issued: 2.11.2021 03.11 UTC
10cm Radio Burst
Begin Time: 2021 Nov 02 0236 UTC
Maximum Time: 2021 Nov 02 0236 UTC
End Time: 2021 Nov 02 0237 UTC
Duration: 1 minutes
Peak Flux: 110 sfu
Latest Penticton Noon Flux: 98 sfu

Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2.11.2021 01.46 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3953
Valid From: 2021 Nov 01 2135 UTC
Now Valid Until: 2021 Nov 02 0900 UTC
Warning Condition: Persistence

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.

WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 1.11.2021 21.50 UTC
Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Nov 02: None (Below G1) Nov 03: None (Below G1) Nov 04: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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.

SUMMARY
10cm Radio Burst
Issued: 1.11.2021 21.41 UTC
10cm Radio Burst
Begin Time: 2021 Nov 01 2111 UTC
Maximum Time: 2021 Nov 01 2114 UTC
End Time: 2021 Nov 01 2125 UTC
Duration: 14 minutes
Peak Flux: 110 sfu
Latest Penticton Noon Flux: 103 sfu

Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
Geomagnetic K-index of 4
Issued: 1.11.2021 21.40 UTC
Geomagnetic K-index of 4
Threshold Reached: 2021 Nov 01 2140 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 1.11.2021 21.40 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Nov 01 2135 UTC
Valid To: 2021 Nov 02 0300 UTC
Warning Condition: Onset

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.

ALERT
Type II Radio Emission
Issued: 1.11.2021 02.09 UTC
Type II Radio Emission
Begin Time: 2021 Nov 01 0129 UTC
Estimated Velocity: 626 km/s

Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT
Type IV Radio Emission
Issued: 1.11.2021 02.08 UTC
Type IV Radio Emission
Begin Time: 2021 Nov 01 0130 UTC

Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

SUMMARY
10cm Radio Burst
Issued: 1.11.2021 02.01 UTC
10cm Radio Burst
Begin Time: 2021 Nov 01 0129 UTC
Maximum Time: 2021 Nov 01 0133 UTC
End Time: 2021 Nov 01 0134 UTC
Duration: 5 minutes
Peak Flux: 210 sfu
Latest Penticton Noon Flux: 103 sfu

Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

ALERT
Geomagnetic K-index of 5
Issued: 31.10.2021 15.02 UTC
Geomagnetic K-index of 5
Threshold Reached: 2021 Oct 31 1459 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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.

WARNING
Geomagnetic K-index of 5 expected
Issued: 31.10.2021 13.20 UTC
Geomagnetic K-index of 5 expected
Valid From: 2021 Oct 31 1319 UTC
Valid To: 2021 Oct 31 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

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.

ALERT
Geomagnetic K-index of 4
Issued: 31.10.2021 13.13 UTC
Geomagnetic K-index of 4
Threshold Reached: 2021 Oct 31 1307 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes

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.

SUMMARY
Proton Event 10MeV Integral Flux exceeded 10pfu
Issued: 31.10.2021 11.56 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2021 Oct 30 2100 UTC
Maximum Time: 2021 Oct 30 2105 UTC
End Time: 2021 Oct 30 2130 UTC
Maximum 10MeV Flux: 11 pfu
NOAA Scale: S1 - Minor

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 31.10.2021 11.30 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 3951
Valid From: 2021 Oct 30 2150 UTC
Now Valid Until: 2021 Nov 01 0900 UTC
Warning Condition: Persistence

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.

WARNING
Geomagnetic K-index of 5 expected
Issued: 30.10.2021 22.47 UTC
Geomagnetic K-index of 5 expected
Valid From: 2021 Oct 30 2247 UTC
Valid To: 2021 Oct 31 0900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

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.

ALERT
Geomagnetic K-index of 4
Issued: 30.10.2021 22.42 UTC
Geomagnetic K-index of 4
Threshold Reached: 2021 Oct 30 2237 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 30.10.2021 21.49 UTC
Geomagnetic K-index of 4 expected
Valid From: 2021 Oct 30 2150 UTC
Valid To: 2021 Oct 31 1200 UTC
Warning Condition: Onset

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.

ALERT
Proton Event 10MeV Integral Flux exceeded 10pfu
Issued: 30.10.2021 21.18 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2021 Oct 30 2100 UTC
NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

WARNING
Proton 10MeV Integral Flux above 10pfu expected
Issued: 30.10.2021 21.06 UTC
Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2021 Oct 30 2105 UTC
Valid To: 2021 Oct 31 1200 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

CANCEL WARNING
Proton 10MeV Integral Flux above 10pfu expected
Issued: 30.10.2021 20.05 UTC
Proton 10MeV Integral Flux above 10pfu expected
Cancel Serial Number: 478
Original Issue Time: 2021 Oct 28 1748 UTC

Comment: Conditions no longer meet Warning criteria.

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

SUMMARY
Proton Event 10MeV Integral Flux exceeded 10pfu
Issued: 30.10.2021 20.04 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2021 Oct 28 1740 UTC
Maximum Time: 2021 Oct 29 0250 UTC
End Time: 2021 Oct 30 1610 UTC
Maximum 10MeV Flux: 29 pfu
NOAA Scale: S1 - Minor

EXTENDED WARNING
Proton 10MeV Integral Flux above 10pfu expected
Issued: 30.10.2021 11.20 UTC
Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 477
Valid From: 2021 Oct 28 1745 UTC
Now Valid Until: 2021 Oct 31 0600 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

SUMMARY
Proton Event 100MeV Integral Flux exceeded 1pfu
Issued: 30.10.2021 09.35 UTC
Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2021 Oct 28 1635 UTC
Maximum Time: 2021 Oct 28 1815 UTC
End Time: 2021 Oct 30 0440 UTC
Maximum 100MeV Flux: 7 pfu

CANCEL WARNING
Proton 100MeV Integral Flux above 1pfu expected
Issued: 30.10.2021 09.26 UTC
Proton 100MeV Integral Flux above 1pfu expected
Cancel Serial Number: 89
Original Issue Time: 2021 Oct 28 1747 UTC

Comment: The greater than 100 MeV proton flux decreased below 1 pfu, and is no longer expected to exceed event threshold.

Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.

Table

Date Radio flux 10.7 cm SESC Sunspot number Sunspot area 10E-6 New regions GOES15 X-ray Bkgd flux Flares
X-ray Optical
C M X S 1 2 3
30/10/21 107 76 470 1 * 7 0 0 4 1 0 0
31/10/21 103 83 480 1 * 4 0 0 5 0 0 0
01/11/21 98 53 570 0 * 4 1 0 2 1 0 0
02/11/21 97 42 400 0 * 2 1 0 2 1 0 0
03/11/21 89 41 300 0 * 1 0 0 1 0 0 0
04/11/21 94 28 210 0 * 3 0 0 0 0 0 0
05/11/21 93 40 280 1 * 2 0 0 0 0 0 0
06/11/21 82 41 330 0 * 2 0 0 2 0 0 0
07/11/21 88 28 240 0 * 0 0 0 0 0 0 0
08/11/21 88 41 310 1 * 2 0 0 2 0 0 0
09/11/21 92 40 410 0 * 0 1 0 1 0 0 0
10/11/21 88 37 410 0 * 0 0 0 0 0 0 0
11/11/21 85 39 300 0 * 0 0 0 0 0 0 0
12/11/21 83 39 220 0 * 0 0 0 0 0 0 0
13/11/21 81 24 110 0 * 1 0 0 1 0 0 0
14/11/21 78 23 170 1 * 0 0 0 0 0 0 0
15/11/21 79 23 130 0 * 0 0 0 0 0 0 0
16/11/21 80 35 330 1 * 0 0 0 0 0 0 0
17/11/21 79 33 270 0 * 0 0 0 1 0 0 0
18/11/21 82 22 40 0 * 0 0 0 0 0 0 0
19/11/21 79 22 40 0 * 0 0 0 0 0 0 0
20/11/21 80 22 40 0 * 0 0 0 0 0 0 0
21/11/21 79 22 20 0 * 0 0 0 0 0 0 0
22/11/21 78 22 30 0 * 0 0 0 0 0 0 0
23/11/21 80 39 80 1 * 0 0 0 0 0 0 0
24/11/21 83 39 50 0 * 0 0 0 0 0 0 0
25/11/21 94 20 90 0 * 0 0 0 0 0 0 0
26/11/21 92 52 190 2 * 0 0 0 0 0 0 0
27/11/21 92 53 320 0 * 0 0 0 0 0 0 0
28/11/21 92 53 270 1 * 0 0 0 0 0 0 0
Average/Total 87 38 237 10 28 3 0 21 3 0 0

Summary graph

Flares

Solar wind

Solar Wind

The solar wind is a stream of plasma released from the upper atmosphere of the Sun. It consists of mostly electrons, protons and alpha particles with energies usually between 1.5 and 10 keV. The stream of particles varies in density, temperature, and speed over time and over solar longitude. These particles can escape the Sun's gravity because of their high energy, from the high temperature of the corona and magnetic, electrical and electromagnetic phenomena in it.

The solar wind is divided into two components, respectively termed the slow solar wind and the fast solar wind. The slow solar wind has a velocity of about 400 km/s, a temperature of 1.4–1.6×10e6 K and a composition that is a close match to the corona. By contrast, the fast solar wind has a typical velocity of 750 km/s, a temperature of 8×10e5 K and it nearly matches the composition of the Sun's photosphere. The slow solar wind is twice as dense and more variable in intensity than the fast solar wind. The slow wind also has a more complex structure, with turbulent regions and large-scale structures.

Solar radio flux at 10.7 cm

Solar radio flux at 10.7 cm

The solar radio flux at 10.7 cm (2800 MHz) is an excellent indicator of solar activity. Often called the F10.7 index, it is one of the longest running records of solar activity. The F10.7 radio emissions originates high in the chromosphere and low in the corona of the solar atmosphere. The F10.7 correlates well with the sunspot number as well as a number of UltraViolet (UV) and visible solar irradiance records. Reported in “solar flux units”, (s.f.u.), the F10.7 can vary from below 50 s.f.u., to above 300 s.f.u., over the course of a solar cycle.

Flares

Flares

A solar flare is a sudden flash of brightness observed over the Sun's surface or the solar limb, which is interpreted as a large energy release of up to 6 × 10e25 joules of energy. They are often, but not always, followed by a colossal coronal mass ejection. The flare ejects clouds of electrons, ions, and atoms through the corona of the sun into space. These clouds typically reach Earth a day or two after the event.

Solar flares affect all layers of the solar atmosphere (photosphere, chromosphere, and corona), when the plasma medium is heated to tens of millions of kelvin, while the electrons, protons, and heavier ions are accelerated to near the speed of light. They produce radiation across the electromagnetic spectrum at all wavelengths, from radio waves to gamma rays, although most of the energy is spread over frequencies outside the visual range and for this reason the majority of the flares are not visible to the naked eye and must be observed with special instruments. Flares occur in active regions around sunspots, where intense magnetic fields penetrate the photosphere to link the corona to the solar interior. Flares are powered by the sudden (timescales of minutes to tens of minutes) release of magnetic energy stored in the corona. The same energy releases may produce coronal mass ejections (CME), although the relation between CMEs and flares is still not well established.

The frequency of occurrence of solar flares varies, from several per day when the Sun is particularly "active" to less than one every week when the Sun is "quiet", following the 11-year cycle (the solar cycle). Large flares are less frequent than smaller ones.

Classification

Solar flares are classified as A, B, C, M or X according to the peak flux (in watts per square metre, W/m2) of 100 to 800 picometre X-rays near Earth, as measured on the GOES spacecraft.

Classification Peak Flux Range at 100-800 picometer
W/m2
A < 10e-7
B 10e-7 to 10e-6
C 10e-6 to 10e-5
M 10e-5 to 10e-4
X 10e-4 to 10e-3
Z > 10e-3

An earlier flare classification is based on Hα spectral observations. The scheme uses both the intensity and emitting surface. The classification in intensity is qualitative, referring to the flares as: (f)aint, (n)ormal or (b)rilliant. The emitting surface is measured in terms of millionths of the hemisphere and is described below. (The total hemisphere area AH = 6.2 × 1012 km2.)

Classification Corrected area
(millionths of hemisphere)
S < 100
1 100 - 250
2 250 - 600
3 600 - 1200
4 > 1200

Sunspot number

Sunspots

Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They correspond to concentrations of magnetic field that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere. Sunspots usually appear in pairs, with pair members of opposite magnetic polarity. The number of sunspots varies according to the approximately 11-year solar cycle.

Sunspot populations quickly rise and more slowly fall on an irregular cycle of 11 years, although significant variations in the number of sunspots attending the 11-year period are known over longer spans of time. For example, from 1900 to the 1960s, the solar maxima trend of sunspot count has been upward; from the 1960s to the present, it has diminished somewhat. Over the last decades the Sun has had a markedly high average level of sunspot activity; it was last similarly active over 8,000 years ago.

The number of sunspots correlates with the intensity of solar radiation over the period since 1979, when satellite measurements of absolute radiative flux became available. Since sunspots are darker than the surrounding photosphere it might be expected that more sunspots would lead to less solar radiation and a decreased solar constant. However, the surrounding margins of sunspots are brighter than the average, and so are hotter; overall, more sunspots increase the Sun's solar constant or brightness. The variation caused by the sunspot cycle to solar output is relatively small, on the order of 0.1% of the solar constant (a peak-to-trough range of 1.3 W/m2 compared to 1366 W/m2 for the average solar constant).

K-indices



Today


0h
UTC
3h
UTC
6h
UTC
9h
UTC
12h
UTC
15h
UTC
18h
UTC
21h
UTC
4



Data


Estimated Planetary

Estimated Planetary

Date A K-indices (UTC)
0h 3h 6h 9h 12h 15h 18h 21h
31/10/21 20 4 3 3 3 5 3 3 4
01/11/21 10 2 3 2 2 1 1 3 4
02/11/21 17 4 4 3 4 3 2 2 2
03/11/21 21 3 1 2 1 1 0 4 7
04/11/21 69 6 5 7 7 6 4 2 2
05/11/21 13 2 4 3 1 3 4 3 3
06/11/21 18 4 3 3 3 1 4 3 3
07/11/21 6 4 1 0 1 1 1 1 0
08/11/21 5 0 0 0 1 1 1 2 3
09/11/21 7 2 2 2 1 1 1 2 3
10/11/21 8 3 2 3 1 1 1 2 1
11/11/21 4 1 0 1 1 2 1 1 1
12/11/21 4 1 2 1 1 1 0 0 1
13/11/21 3 0 1 1 1 0 0 1 1
14/11/21 4 1 1 1 1 1 1 0 1
15/11/21 9 0 1 1 1 1 2 4 4
16/11/21 13 4 4 3 2 2 2 2 2
17/11/21 12 4 2 3 3 2 2 2 3
18/11/21 5 2 2 1 1 1 1 1 1
19/11/21 5 1 1 1 1 2 1 2 2
20/11/21 10 2 1 2 2 2 3 2 3
21/11/21 12 3 2 2 3 3 3 2 3
22/11/21 9 3 3 0 1 1 2 2 2
23/11/21 9 2 2 2 3 2 2 2 2
24/11/21 5 2 2 2 1 1 1 1 1
25/11/21 5 2 2 1 1 1 1 1 1
26/11/21 4 1 1 1 1 1 2 0 1
27/11/21 5 0 0 1 1 1 1 1 3
28/11/21 9 3 3 2 2 1 1 2 3
29/11/21 11 4

Middle Latitude

Date A K-indices
31/10/21 16 3 3 4 2 4 2 3 3
01/11/21 8 2 2 1 1 1 2 3 3
02/11/21 12 4 4 2 3 2 1 2 1
03/11/21 14 2 0 1 0 1 1 3 6
04/11/21 42 6 3 6 6 5 3 2 2
05/11/21 9 1 3 2 1 3 3 2 2
06/11/21 13 4 3 2 3 2 3 2 2
07/11/21 4 3 1 0 1 1 1 1 0
08/11/21 3 0 0 0 0 2 1 2 2
09/11/21 6 2 2 2 0 1 2 2 2
10/11/21 5 2 2 2 1 2 1 1 1
11/11/21 3 0 0 0 1 2 2 1 0
12/11/21 3 2 2 1 0 1 1 1 0
13/11/21 0 0 0 0 0 1 0 0 0
14/11/21 2 1 0 0 0 1 1 0 1
15/11/21 6 0 0 0 0 2 2 3 3
16/11/21 11 4 3 2 2 1 2 2 3
17/11/21 9 3 2 3 3 1 2 1 2
18/11/21 3 1 2 1 1 1 1 0 1
19/11/21 3 1 0 1 0 2 1 1 1
20/11/21 7 1 1 2 2 2 3 2 2
21/11/21 8 3 2 1 2 2 2 2 2
22/11/21 7 3 3 0 1 1 2 2 1
23/11/21 7 1 2 1 3 1 2 2 2
24/11/21 3 1 1 1 1 1 1 1 0
25/11/21 3 1 1 1 1 1 1 1 0
26/11/21 3 0 1 1 0 1 2 1 1
27/11/21 3 0 0 1 0 1 1 1 3
28/11/21 7 2 3 2 1 1 1 2 2
29/11/21 3

High Latitude

Date A K-indices
31/10/21 24 2 3 5 3 6 3 2 2
01/11/21 11 2 2 2 5 1 1 2 2
02/11/21 27 2 3 3 6 6 2 2 1
03/11/21 14 1 1 3 2 3 1 3 5
04/11/21 31 5 5 8 9 8 5 3 2
05/11/21 16 2 3 1 0 3 5 4 3
06/11/21 23 3 2 4 6 3 3 3 2
07/11/21 4 3 1 0 0 1 0 2 0
08/11/21 2 0 0 0 0 0 1 2 2
09/11/21 5 1 2 2 2 1 0 1 2
10/11/21 9 2 1 4 3 3 1 0 0
11/11/21 10 0 0 1 3 5 2 1 0
12/11/21 0 0 0 0 0 0 0 0 0
13/11/21 0 0 0 1 0 0
14/11/21 1 0 0 2 1 0 0 0
15/11/21 6 0 0 0 0 3 2 2 3
16/11/21 18 2 4 2 5 4 3 2 1
17/11/21 18 2 2 3 6 3 2 2 1
18/11/21 2 1 1 1 2 0 0 0 0
19/11/21 2 0 0 1 0 2 1 0 1
20/11/21 14 2 1 2 4 4 4 2 2
21/11/21 18 3 3 3 5 4 3 2 1
22/11/21 5 2 2 0 1 2 2 2 1
23/11/21 20 2 3 1 6 3 4 2 1
24/11/21 4 2 1 1 3 1 0 0 0
25/11/21 3 0 1 2 2 1 1 0 0
26/11/21 0 0 0 0 0 0 0 0 0
27/11/21 2 0 0 0 0 2 0 0 2
28/11/21 3 2 1 0 2 2 0 0 1
29/11/21 2

About

The K-index quantifies disturbances in the horizontal component of earth's magnetic field with an integer in the range 0–9 with 1 being calm and 5 or more indicating a geomagnetic storm. It is derived from the maximum fluctuations of horizontal components observed on a magnetometer during a three-hour interval. The label K comes from the German word Kennziffer meaning “characteristic digit”. The K-index was introduced by Julius Bartels in 1938.

The Estimated 3-hour Planetary Kp-index is derived at the NOAA Space Weather Prediction Center using data from the following ground-based magnetometers:

  • Sitka, Alaska
  • Meanook, Canada
  • Ottawa, Canada
  • Fredericksburg, Virginia
  • Hartland, UK
  • Wingst, Germany
  • Niemegk, Germany
  • Canberra, Australia

These data are made available thanks to the cooperative efforts between SWPC and data providers around the world, which currently includes the U.S. Geological Survey, Natural Resources Canada (NRCAN), the British Geological Survey, the German Research Centre for Geosciences (GFZ), and Geoscience Australia. Important magnetometer observations are also contributed by the Institut de Physique du Globe de Paris and the Korean Space Weather Center K-index Watches are issued when the highest predicted NOAA estimated Kp-indices for a day are K = 5, 6, 7, or >= 8 and is reported in terms of the NOAA G scale. K-index Warnings are issued when NOAA estimated Kp-indices of 4, 5, 6, and 7 or greater are expected. K-index Alerts are issued when the NOAA estimated Kp-indices reach 4, 5, 6, 7, 8, or 9.


More info
Data source: NOAA, Wikipedia

Design

Design selection...

Units

Language



Icons


Temperature

Humidity

Pressure

Wind speed

Wind gust

Precipitation

Solar radiation

Snow

Apparent temperature

Dew point

UV

Visibility

Cloud base

Evapotranspiration

Indoor temperature

Indoor humidity


Sunrise

Sunset

Moon rise

Moon set

Time

Menu

From

To

Fullscreen

Export as image

Settings

Homepage

Webcam

Table

Graph

Map

Steady

Rising

Falling

Warning

Latitude

Longitude

History

Solar eclipse

Lunar eclipse

GPS

Elevation

Day

Month

Year

High temperature

Low temperature

Day

Night

Spring

Summer

Autumn

Winter