La météorologie de l'espace

La vitesse du vent solaire Vent solaire champs magnétiques Flux radio 10,7 cm à midi
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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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 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
Publié: 09.11.2021 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
Publié: 08.11.2021 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
Publié: 07.11.2021 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
Publié: 07.11.2021 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
Publié: 07.11.2021 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
Publié: 06.11.2021 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
Publié: 06.11.2021 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
Publié: 06.11.2021 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
Publié: 05.11.2021 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
Publié: 05.11.2021 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
Publié: 05.11.2021 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
Publié: 05.11.2021 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
Publié: 05.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 04.11.2021 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
Publié: 03.11.2021 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
Publié: 03.11.2021 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
Publié: 03.11.2021 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
Publié: 03.11.2021 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
Publié: 03.11.2021 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
Publié: 03.11.2021 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
Publié: 03.11.2021 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
Publié: 03.11.2021 19.57 UTC
Geomagnetic Sudden Impulse
Observed: 2021 Nov 03 1957 UTC
Deviation: 21 nT
Station: FRD

WARNING
Geomagnetic K-index of 4 expected
Publié: 03.11.2021 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
Publié: 03.11.2021 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
Publié: 03.11.2021 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
Publié: 02.11.2021 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
Publié: 02.11.2021 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
Publié: 02.11.2021 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
Publié: 02.11.2021 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
Publié: 02.11.2021 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
Publié: 01.11.2021 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
Publié: 01.11.2021 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
Publié: 01.11.2021 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
Publié: 01.11.2021 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
Publié: 01.11.2021 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
Publié: 01.11.2021 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
Publié: 01.11.2021 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.

Table

Date Radio flux 10.7 cm SESC Le nombre des taches solaires Tache de la zone 10E-6 De nouvelles régions GOES15 X-ray Bkgd flux éclairs
X-ray Optique
C M X S 1 2 3
31-10-2021 103 83 480 1 * 4 0 0 5 0 0 0
01-11-2021 98 53 570 0 * 4 1 0 2 1 0 0
02-11-2021 97 42 400 0 * 2 1 0 2 1 0 0
03-11-2021 89 41 300 0 * 1 0 0 1 0 0 0
04-11-2021 94 28 210 0 * 3 0 0 0 0 0 0
05-11-2021 93 40 280 1 * 2 0 0 0 0 0 0
06-11-2021 82 41 330 0 * 2 0 0 2 0 0 0
07-11-2021 88 28 240 0 * 0 0 0 0 0 0 0
08-11-2021 88 41 310 1 * 2 0 0 2 0 0 0
09-11-2021 92 40 410 0 * 0 1 0 1 0 0 0
10-11-2021 88 37 410 0 * 0 0 0 0 0 0 0
11-11-2021 85 39 300 0 * 0 0 0 0 0 0 0
12-11-2021 83 39 220 0 * 0 0 0 0 0 0 0
13-11-2021 81 24 110 0 * 1 0 0 1 0 0 0
14-11-2021 78 23 170 1 * 0 0 0 0 0 0 0
15-11-2021 79 23 130 0 * 0 0 0 0 0 0 0
16-11-2021 80 35 330 1 * 0 0 0 0 0 0 0
17-11-2021 79 33 270 0 * 0 0 0 1 0 0 0
18-11-2021 82 22 40 0 * 0 0 0 0 0 0 0
19-11-2021 79 22 40 0 * 0 0 0 0 0 0 0
20-11-2021 80 22 40 0 * 0 0 0 0 0 0 0
21-11-2021 79 22 20 0 * 0 0 0 0 0 0 0
22-11-2021 78 22 30 0 * 0 0 0 0 0 0 0
23-11-2021 80 39 80 1 * 0 0 0 0 0 0 0
24-11-2021 83 39 50 0 * 0 0 0 0 0 0 0
25-11-2021 94 20 90 0 * 0 0 0 0 0 0 0
26-11-2021 92 52 190 2 * 0 0 0 0 0 0 0
27-11-2021 92 53 320 0 * 0 0 0 0 0 0 0
28-11-2021 92 53 270 1 * 0 0 0 0 0 0 0
29-11-2021 90 47 360 0 * 0 0 0 0 0 0 0
Moyenne/Total 87 37 233 9 21 3 0 17 2 0 0

Graphique de synthèse

éclairs

Solar wind

Solar Wind

Le vent solaire est un flux de plasma libéré de la haute atmosphère du Soleil. Il se compose principalement d'électrons, de protons et de particules alpha avec des énergies généralement comprises entre 1,5 et 10 keV. Le flux de particules varie en densité, température et vitesse dans le temps et sur la longitude solaire. Ces particules peuvent échapper à la gravité du Soleil en raison de leur haute énergie, de la température élevée de la couronne et des phénomènes magnétiques, électriques et électromagnétiques qu'elle contient.

Le vent solaire est divisé en deux composantes, respectivement appelées le vent solaire lent et le vent solaire rapide. Le vent solaire lent a une vitesse d'environ 400 km / s, une température de 1,4–1,6 × 10e6 K et une composition proche de la couronne. En revanche, le vent solaire rapide a une vitesse typique de 750 km / s, une température de 8 × 10e5 K et il correspond presque à la composition de la photosphère du Soleil. Le vent solaire lent est deux fois plus dense et plus variable en intensité que le vent solaire rapide. Le vent lent a également une structure plus complexe, avec des régions turbulentes et des structures à grande échelle.

Solar radio flux at 10.7 cm

Solar radio flux at 10.7 cm

Le flux radioélectrique solaire à 10,7 cm (2800 MHz) est un excellent indicateur de l'activité solaire. Souvent appelé indice F10.7, c'est l'un des enregistrements les plus anciens d'activité solaire. Les émissions radio F10.7 proviennent de haut dans la chromosphère et bas dans la couronne de l'atmosphère solaire. Le F10.7 est bien corrélé avec le nombre de taches solaires ainsi qu'avec un certain nombre d'enregistrements d'irradiance solaire UltraViolet (UV) et visible. Rapporté en «unités de flux solaire» (s.f.u.), le F10.7 peut varier de moins de 50 s.f.u., à plus de 300 s.f.u., au cours d'un cycle solaire.

Flares

Flares

Une éruption solaire est un éclair soudain de luminosité observé à la surface du Soleil ou sur le flanc solaire, qui est interprété comme une importante libération d'énergie allant jusqu'à 6 × 10e25 joules d'énergie. Ils sont souvent, mais pas toujours, suivis d'une éjection de masse coronale colossale. La fusée éjecte des nuages ​​d'électrons, d'ions et d'atomes à travers la couronne du soleil dans l'espace. Ces nuages ​​atteignent généralement la Terre un jour ou deux après l'événement.

Les éruptions solaires affectent toutes les couches de l'atmosphère solaire (photosphère, chromosphère et couronne), lorsque le milieu plasma est chauffé à des dizaines de millions de kelvin, tandis que les électrons, les protons et les ions plus lourds sont accélérés à près de la vitesse de la lumière. Ils produisent un rayonnement à travers le spectre électromagnétique à toutes les longueurs d'onde, des ondes radio aux rayons gamma, bien que la plupart de l'énergie soit répartie sur des fréquences en dehors de la plage visuelle et pour cette raison, la majorité des fusées éclairantes ne sont pas visibles à l'œil nu et doivent être observé avec des instruments spéciaux. Les éruptions se produisent dans les régions actives autour des taches solaires, où des champs magnétiques intenses pénètrent dans la photosphère pour relier la couronne à l'intérieur solaire. Les fusées éclairantes sont alimentées par la libération soudaine (de quelques minutes à des dizaines de minutes) d'énergie magnétique stockée dans la couronne. Les mêmes rejets d'énergie peuvent produire des éjections de masse coronale (CME), bien que la relation entre les CME et les éruptions ne soit pas encore bien établie.

La fréquence d'apparition des éruptions solaires varie, de plusieurs par jour lorsque le Soleil est particulièrement «actif» à moins d'une par semaine lorsque le Soleil est «calme», suivant le cycle de 11 ans (le cycle solaire). Les grosses fusées éclairantes sont moins fréquentes que les plus petites.

Classification

Les éruptions solaires sont classées comme A, B, C, M ou X selon le flux de pointe (en watts par mètre carré, W / m2) de rayons X de 100 à 800 picomètres près de la Terre, tel que mesuré sur le vaisseau spatial GOES.

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

Les taches solaires sont des phénomènes temporaires sur la photosphère du Soleil qui apparaissent visiblement comme des taches sombres par rapport aux régions environnantes. Ils correspondent à des concentrations de champ magnétique qui inhibent la convection et entraînent une température de surface réduite par rapport à la photosphère environnante. Les taches solaires apparaissent généralement par paires, avec des membres de paires de polarité magnétique opposée. Le nombre de taches solaires varie en fonction du cycle solaire d'environ 11 ans.

Les populations de taches solaires augmentent rapidement et diminuent plus lentement selon un cycle irrégulier de 11 ans, bien que des variations significatives du nombre de taches solaires observant la période de 11 ans soient connues sur des périodes plus longues. Par exemple, de 1900 aux années 1960, la tendance des maxima solaires du nombre de taches solaires a été à la hausse; des années 1960 à nos jours, il a quelque peu diminué. Au cours des dernières décennies, le Soleil a eu un niveau moyen d'activité des taches solaires nettement élevé; il était également actif pour la dernière fois il y a plus de 8 000 ans.

Le nombre de taches solaires est en corrélation avec l'intensité du rayonnement solaire au cours de la période depuis 1979, lorsque les mesures par satellite du flux radiatif absolu sont devenues disponibles. Étant donné que les taches solaires sont plus sombres que la photosphère environnante, on peut s'attendre à ce que plus de taches solaires conduisent à moins de rayonnement solaire et à une constante solaire diminuée. Cependant, les marges environnantes des taches solaires sont plus lumineuses que la moyenne et sont donc plus chaudes; Dans l'ensemble, plus de taches solaires augmentent la constante solaire ou la luminosité du Soleil. La variation causée par le cycle des taches solaires à la production solaire est relativement faible, de l'ordre de 0,1% de la constante solaire (une plage pic à creux de 1,3 W / m2 contre 1366 W / m2 pour la constante solaire moyenne).

K-indices



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Data


Estimated Planetary

Estimated Planetary

Date A K-indices (UTC)
0h 3h 6h 9h 12h 15h 18h 21h
01-11-2021 10 2 3 2 2 1 1 3 4
02-11-2021 17 4 4 3 4 3 2 2 2
03-11-2021 21 3 1 2 1 1 0 4 7
04-11-2021 69 6 5 7 7 6 4 2 2
05-11-2021 13 2 4 3 1 3 4 3 3
06-11-2021 18 4 3 3 3 1 4 3 3
07-11-2021 6 4 1 0 1 1 1 1 0
08-11-2021 5 0 0 0 1 1 1 2 3
09-11-2021 7 2 2 2 1 1 1 2 3
10-11-2021 8 3 2 3 1 1 1 2 1
11-11-2021 4 1 0 1 1 2 1 1 1
12-11-2021 4 1 2 1 1 1 0 0 1
13-11-2021 3 0 1 1 1 0 0 1 1
14-11-2021 4 1 1 1 1 1 1 0 1
15-11-2021 9 0 1 1 1 1 2 4 4
16-11-2021 13 4 4 3 2 2 2 2 2
17-11-2021 12 4 2 3 3 2 2 2 3
18-11-2021 5 2 2 1 1 1 1 1 1
19-11-2021 5 1 1 1 1 2 1 2 2
20-11-2021 10 2 1 2 2 2 3 2 3
21-11-2021 12 3 2 2 3 3 3 2 3
22-11-2021 9 3 3 0 1 1 2 2 2
23-11-2021 9 2 2 2 3 2 2 2 2
24-11-2021 5 2 2 2 1 1 1 1 1
25-11-2021 5 2 2 1 1 1 1 1 1
26-11-2021 4 1 1 1 1 1 2 0 1
27-11-2021 5 0 0 1 1 1 1 1 3
28-11-2021 9 3 3 2 2 1 1 2 3
29-11-2021 9 4 4 1 1 1 1 2 1
30-11-2021 4 1 0 1 0

Middle Latitude

Date A K-indices
01-11-2021 8 2 2 1 1 1 2 3 3
02-11-2021 12 4 4 2 3 2 1 2 1
03-11-2021 14 2 0 1 0 1 1 3 6
04-11-2021 42 6 3 6 6 5 3 2 2
05-11-2021 9 1 3 2 1 3 3 2 2
06-11-2021 13 4 3 2 3 2 3 2 2
07-11-2021 4 3 1 0 1 1 1 1 0
08-11-2021 3 0 0 0 0 2 1 2 2
09-11-2021 6 2 2 2 0 1 2 2 2
10-11-2021 5 2 2 2 1 2 1 1 1
11-11-2021 3 0 0 0 1 2 2 1 0
12-11-2021 3 2 2 1 0 1 1 1 0
13-11-2021 0 0 0 0 0 1 0 0 0
14-11-2021 2 1 0 0 0 1 1 0 1
15-11-2021 6 0 0 0 0 2 2 3 3
16-11-2021 11 4 3 2 2 1 2 2 3
17-11-2021 9 3 2 3 3 1 2 1 2
18-11-2021 3 1 2 1 1 1 1 0 1
19-11-2021 3 1 0 1 0 2 1 1 1
20-11-2021 7 1 1 2 2 2 3 2 2
21-11-2021 8 3 2 1 2 2 2 2 2
22-11-2021 7 3 3 0 1 1 2 2 1
23-11-2021 7 1 2 1 3 1 2 2 2
24-11-2021 3 1 1 1 1 1 1 1 0
25-11-2021 3 1 1 1 1 1 1 1 0
26-11-2021 3 0 1 1 0 1 2 1 1
27-11-2021 3 0 0 1 0 1 1 1 3
28-11-2021 7 2 3 2 1 1 1 2 2
29-11-2021 6 3 3 1 1 1 1 1 0
30-11-2021 0 0 1 0

High Latitude

Date A K-indices
01-11-2021 11 2 2 2 5 1 1 2 2
02-11-2021 27 2 3 3 6 6 2 2 1
03-11-2021 14 1 1 3 2 3 1 3 5
04-11-2021 31 5 5 8 9 8 5 3 2
05-11-2021 16 2 3 1 0 3 5 4 3
06-11-2021 23 3 2 4 6 3 3 3 2
07-11-2021 4 3 1 0 0 1 0 2 0
08-11-2021 2 0 0 0 0 0 1 2 2
09-11-2021 5 1 2 2 2 1 0 1 2
10-11-2021 9 2 1 4 3 3 1 0 0
11-11-2021 10 0 0 1 3 5 2 1 0
12-11-2021 0 0 0 0 0 0 0 0 0
13-11-2021 0 0 0 1 0 0
14-11-2021 1 0 0 2 1 0 0 0
15-11-2021 6 0 0 0 0 3 2 2 3
16-11-2021 18 2 4 2 5 4 3 2 1
17-11-2021 18 2 2 3 6 3 2 2 1
18-11-2021 2 1 1 1 2 0 0 0 0
19-11-2021 2 0 0 1 0 2 1 0 1
20-11-2021 14 2 1 2 4 4 4 2 2
21-11-2021 18 3 3 3 5 4 3 2 1
22-11-2021 5 2 2 0 1 2 2 2 1
23-11-2021 20 2 3 1 6 3 4 2 1
24-11-2021 4 2 1 1 3 1 0 0 0
25-11-2021 3 0 1 2 2 1 1 0 0
26-11-2021 0 0 0 0 0 0 0 0 0
27-11-2021 2 0 0 0 0 2 0 0 2
28-11-2021 3 2 1 0 2 2 0 0 1
29-11-2021 11 2 4 1 4 3 1 1 0
30-11-2021 0 0 2 1

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
Source de données: NOAA, Wikipedia

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Rafale de vent

Précipitations

Rayonnement solaire

Neige

Température ressentie

Point de rosée

INDICE UV

Visibilité

Base des nuages

Evapotraspiration

Température intérieure

Humidité intérieure


Lever du soleil

Coucher du soleil

Lever de lune

Coucher de lune

Time

Menu

De

à

Plein écran

Exporter comme image

Réglages

Page d'accueil

Caméra Web

Table

Graphique

Carte

Stable

En hausse

En baisse

Vigilance

Latitude

Longitude

Historique

éclipse solaire

éclipse de lune

GPS

Élévation

Jour

Mois

Année

Haut température

Basse température

Jour

Nuit

Printemps

Été

Automne

Hiver