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    Les utilisateurs de meteotemplate dans le monde

La météorologie de l'espace

La vitesse du vent solaire Vent solaire champs magnétiques Flux radio 10,7 cm à midi
Bt Bz

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WARNING
Geomagnetic K-index of 4 expected
Issued: 2024-10-04 22.59 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Oct 04 2300 UTC
Valid To: 2024 Oct 05 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.

WATCH
Geomagnetic Storm Category G3 Predicted
Issued: 2024-10-04 18.57 UTC
Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
Oct 05: G3 (Strong) Oct 06: G3 (Strong) Oct 07: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Comment: G1 (Minor) geomagnetic storm watch added to new day three (07 Oct).

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.

SUMMARY
X-ray Event exceeded M5
Issued: 2024-10-03 20.43 UTC
X-ray Event exceeded M5
Begin Time: 2024 Oct 03 2009 UTC
Maximum Time: 2024 Oct 03 2028 UTC
End Time: 2024 Oct 03 2040 UTC
X-ray Class: M6.7
Location: S09W49
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
Type II Radio Emission
Publié: 2024-10-03 20.36 UTC
Type II Radio Emission
Begin Time: 2024 Oct 03 2012 UTC
Estimated Velocity: 1241 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
X-Ray Flux exceeded M5
Publié: 2024-10-03 20.24 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Oct 03 2022 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

WATCH
Geomagnetic Storm Category G3 Predicted
Publié: 2024-10-03 20.13 UTC
Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
Oct 04: G3 (Strong) Oct 05: G3 (Strong) Oct 06: G3 (Strong)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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.

SUMMARY
10cm Radio Burst
Publié: 2024-10-03 13.43 UTC
10cm Radio Burst
Begin Time: 2024 Oct 03 1214 UTC
Maximum Time: 2024 Oct 03 1215 UTC
End Time: 2024 Oct 03 1224 UTC
Duration: 10 minutes
Peak Flux: 3500 sfu
Latest Penticton Noon Flux: 275 sfu

Comment: Castelli-U Burst
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.

SUMMARY
X-ray Event exceeded X1
Publié: 2024-10-03 12.36 UTC
X-ray Event exceeded X1
Begin Time: 2024 Oct 03 1208 UTC
Maximum Time: 2024 Oct 03 1218 UTC
End Time: 2024 Oct 03 1227 UTC
X-ray Class: X9.0
Location: S14W03
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
Type IV Radio Emission
Publié: 2024-10-03 12.33 UTC
Type IV Radio Emission
Begin Time: 2024 Oct 03 1217 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.

ALERT
Type II Radio Emission
Publié: 2024-10-03 12.32 UTC
Type II Radio Emission
Begin Time: 2024 Oct 03 1218 UTC
Estimated Velocity: 573 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.

CANCEL ALERT
Type II Radio Emission
Publié: 2024-10-03 12.32 UTC
Type II Radio Emission
Cancel Serial Number: 1359
Original Issue Time: 2024 Oct 03 1229 UTC

Comment: Wrong sstart time entered
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 II Radio Emission
Publié: 2024-10-03 12.30 UTC
Type II Radio Emission
Begin Time: 2024 Oct 03 1218 UTC
Estimated Velocity: 573 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 II Radio Emission
Publié: 2024-10-03 12.29 UTC
Type II Radio Emission
Begin Time: 2024 Oct 03 1018 UTC
Estimated Velocity: 573 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
X-Ray Flux exceeded M5
Publié: 2024-10-03 12.18 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Oct 03 1215 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

WATCH
Geomagnetic Storm Category G3 Predicted
Publié: 2024-10-02 17.01 UTC
Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
Oct 03: G1 (Minor) Oct 04: G3 (Strong) Oct 05: G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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
Type II Radio Emission
Publié: 2024-10-02 09.05 UTC
Type II Radio Emission
Begin Time: 2024 Oct 02 0544 UTC
Estimated Velocity: 1144 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.

SUMMARY
X-ray Event exceeded X1
Publié: 2024-10-01 22.38 UTC
X-ray Event exceeded X1
Begin Time: 2024 Oct 01 2158 UTC
Maximum Time: 2024 Oct 01 2220 UTC
End Time: 2024 Oct 01 2229 UTC
X-ray Class: X7.1
Optical Class: 2b
Location: S15E19
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

SUMMARY
10cm Radio Burst
Publié: 2024-10-01 22.33 UTC
10cm Radio Burst
Begin Time: 2024 Oct 01 2209 UTC
Maximum Time: 2024 Oct 01 2214 UTC
End Time: 2024 Oct 01 2218 UTC
Duration: 9 minutes
Peak Flux: 810 sfu
Latest Penticton Noon Flux: 245 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
Type II Radio Emission
Publié: 2024-10-01 22.26 UTC
Type II Radio Emission
Begin Time: 2024 Oct 01 2217 UTC
Estimated Velocity: 1246 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
X-Ray Flux exceeded M5
Publié: 2024-10-01 22.14 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Oct 01 2211 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

SUMMARY
X-ray Event exceeded M5
Publié: 2024-10-01 00.26 UTC
X-ray Event exceeded M5
Begin Time: 2024 Sep 30 2337 UTC
Maximum Time: 2024 Sep 30 2359 UTC
End Time: 2024 Oct 01 0023 UTC
X-ray Class: M7.6
Optical Class: 2n
Location: S15E31
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Publié: 2024-09-30 23.55 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Sep 30 2353 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Geomagnetic K-index of 4
Publié: 2024-09-30 01.17 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Sep 30 0115 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-29 23.49 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4709
Valid From: 2024 Sep 29 0424 UTC
Now Valid Until: 2024 Sep 30 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 4 expected
Publié: 2024-09-29 04.25 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Sep 29 0424 UTC
Valid To: 2024 Sep 29 2359 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: 2024-09-26 05.32 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4707
Valid From: 2024 Sep 24 2245 UTC
Now Valid Until: 2024 Sep 26 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.

WATCH
Geomagnetic Storm Category G1 Predicted
Publié: 2024-09-25 20.52 UTC
Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Sep 26: G1 (Minor) Sep 27: None (Below G1) Sep 28: 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.

ALERT
Geomagnetic K-index of 5
Publié: 2024-09-25 16.19 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 25 1619 UTC
Synoptic Period: 1500-1800 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 5 expected
Publié: 2024-09-25 14.57 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1934
Valid From: 2024 Sep 24 2345 UTC
Now Valid Until: 2024 Sep 25 2359 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: 2024-09-25 14.57 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4706
Valid From: 2024 Sep 24 2245 UTC
Now Valid Until: 2024 Sep 26 0600 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 5 expected
Publié: 2024-09-25 08.38 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1933
Valid From: 2024 Sep 24 2345 UTC
Now Valid Until: 2024 Sep 25 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.

ALERT
Geomagnetic K-index of 5
Publié: 2024-09-25 05.49 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 25 0545 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.

ALERT
Geomagnetic K-index of 5
Publié: 2024-09-25 00.00 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 24 2359 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 5 expected
Publié: 2024-09-24 23.46 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 Sep 24 2345 UTC
Valid To: 2024 Sep 25 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
Publié: 2024-09-24 23.42 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Sep 24 2333 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: 2024-09-24 22.44 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Sep 24 2245 UTC
Valid To: 2024 Sep 25 1800 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: 2024-09-23 20.53 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4704
Valid From: 2024 Sep 23 1400 UTC
Now Valid Until: 2024 Sep 24 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: 2024-09-23 20.51 UTC
Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Sep 24: None (Below G1) Sep 25: G1 (Minor) Sep 26: 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.

ALERT
Geomagnetic K-index of 4
Publié: 2024-09-23 14.34 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Sep 23 1434 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.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Publié: 2024-09-23 14.13 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3405
Begin Time: 2024 Sep 19 1740 UTC
Yesterday Maximum 2MeV Flux: 2345 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-23 14.00 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Sep 23 1400 UTC
Valid To: 2024 Sep 23 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.

SUMMARY
10cm Radio Burst
Publié: 2024-09-22 21.53 UTC
10cm Radio Burst
Begin Time: 2024 Sep 22 2123 UTC
Maximum Time: 2024 Sep 22 2127 UTC
End Time: 2024 Sep 22 2132 UTC
Duration: 9 minutes
Peak Flux: 540 sfu
Latest Penticton Noon Flux: 163 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.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Publié: 2024-09-22 10.02 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3404
Begin Time: 2024 Sep 19 1740 UTC
Yesterday Maximum 2MeV Flux: 1718 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: 2024-09-21 14.46 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3403
Begin Time: 2024 Sep 19 1740 UTC
Yesterday Maximum 2MeV Flux: 1241 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: 2024-09-20 14.28 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3402
Begin Time: 2024 Sep 19 1740 UTC
Yesterday Maximum 2MeV Flux: 1228 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Publié: 2024-09-19 18.12 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2024 Sep 19 1740 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: 2024-09-19 13.32 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4702
Valid From: 2024 Sep 19 1026 UTC
Now Valid Until: 2024 Sep 19 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.

ALERT
Geomagnetic K-index of 4
Publié: 2024-09-19 13.28 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Sep 19 1320 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.

WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-19 10.26 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Sep 19 1026 UTC
Valid To: 2024 Sep 19 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 5
Publié: 2024-09-19 02.46 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 19 0246 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.

WARNING
Geomagnetic K-index of 5 expected
Publié: 2024-09-19 01.46 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 Sep 19 0150 UTC
Valid To: 2024 Sep 19 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
Publié: 2024-09-19 00.01 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Sep 18 2359 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: 2024-09-18 23.11 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Sep 18 2315 UTC
Valid To: 2024 Sep 19 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.

SUMMARY
Proton Event 10MeV Integral Flux exceeded 10pfu
Publié: 2024-09-18 00.21 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 Sep 17 0735 UTC
Maximum Time: 2024 Sep 17 1050 UTC
End Time: 2024 Sep 17 1615 UTC
Maximum 10MeV Flux: 33 pfu
NOAA Scale: S1 - Minor

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-17 17.56 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4699
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 18 0600 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 5 expected
Publié: 2024-09-17 17.56 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1930
Valid From: 2024 Sep 16 2335 UTC
Now Valid Until: 2024 Sep 18 0300 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.

ALERT
Geomagnetic K-index of 6
Publié: 2024-09-17 15.04 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 Sep 17 1459 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.

ALERT
Geomagnetic K-index of 5
Publié: 2024-09-17 13.49 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 17 1348 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-17 10.28 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4698
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 17 2100 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 5 expected
Publié: 2024-09-17 10.28 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1929
Valid From: 2024 Sep 16 2335 UTC
Now Valid Until: 2024 Sep 17 1800 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 6 expected
Publié: 2024-09-17 10.28 UTC
Geomagnetic K-Index of 6 expected
Extension to Serial Number: 544
Valid From: 2024 Sep 17 0105 UTC
Now Valid Until: 2024 Sep 17 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.

ALERT
Geomagnetic K-index of 6
Publié: 2024-09-17 10.27 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 Sep 17 1019 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: 2024-09-17 10.12 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 17 1003 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 5
Publié: 2024-09-17 08.21 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 17 0816 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.

ALERT
Proton Event 10MeV Integral Flux exceeded 10pfu
Publié: 2024-09-17 07.52 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 Sep 17 0735 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
Publié: 2024-09-17 05.21 UTC
Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2024 Sep 17 0521 UTC
Valid To: 2024 Sep 17 2359 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.

ALERT
Geomagnetic K-index of 7
Publié: 2024-09-17 04.35 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 Sep 17 0426 UTC
Synoptic Period: 0300-0600 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: 2024-09-17 03.53 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 Sep 17 0346 UTC
Synoptic Period: 0300-0600 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: 2024-09-17 03.31 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 17 0331 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.

ALERT
Geomagnetic K-index of 8, 9-
Publié: 2024-09-17 03.00 UTC
Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 Sep 17 0257 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

ALERT
Geomagnetic K-index of 7
Publié: 2024-09-17 01.28 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 Sep 17 0127 UTC
Synoptic Period: 0000-0300 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.

WARNING
Geomagnetic K-index of 7 or greater expected
Publié: 2024-09-17 01.18 UTC
Geomagnetic K-index of 7 or greater expected
Valid From: 2024 Sep 17 0120 UTC
Valid To: 2024 Sep 17 1200 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater

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: 2024-09-17 01.14 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 Sep 17 0113 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: 2024-09-17 01.05 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 17 0103 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.

WARNING
Geomagnetic K-Index of 6 expected
Publié: 2024-09-17 01.05 UTC
Geomagnetic K-Index of 6 expected
Valid From: 2024 Sep 17 0105 UTC
Valid To: 2024 Sep 17 1200 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.

SUMMARY
Geomagnetic Sudden Impulse
Publié: 2024-09-16 23.41 UTC
Geomagnetic Sudden Impulse
Observed: 2024 Sep 16 2329 UTC
Deviation: 39 nT
Station: BOU

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-16 23.32 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4697
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 17 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.

WARNING
Geomagnetic K-index of 5 expected
Publié: 2024-09-16 23.32 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 Sep 16 2335 UTC
Valid To: 2024 Sep 17 1200 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.

WARNING
Geomagnetic Sudden Impulse expected
Publié: 2024-09-16 23.02 UTC
Geomagnetic Sudden Impulse expected
Valid From: 2024 Sep 16 2310 UTC
Valid To: 2024 Sep 17 0010 UTC
IP Shock Passage Observed: 2024 Sep 16 2249 UTC

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-16 14.55 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4696
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 17 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.

WARNING
Geomagnetic K-index of 5 expected
Publié: 2024-09-16 10.28 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 Sep 16 1028 UTC
Valid To: 2024 Sep 16 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.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Publié: 2024-09-16 10.16 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3400
Begin Time: 2024 Sep 15 1215 UTC
Yesterday Maximum 2MeV Flux: 1693 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: 2024-09-16 08.45 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4695
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 16 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 4 expected
Publié: 2024-09-16 02.46 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4694
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 16 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-15 17.55 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4693
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 16 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
Electron 2MeV Integral Flux exceeded 1000pfu
Publié: 2024-09-15 12.30 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2024 Sep 15 1215 UTC
Station: GOES16

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-15 11.27 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4692
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 15 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: 2024-09-14 22.58 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4691
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 15 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.

WATCH
Geomagnetic Storm Category G3 Predicted
Publié: 2024-09-14 21.04 UTC
Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
Sep 15: None (Below G1) Sep 16: G3 (Strong) Sep 17: G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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.

SUMMARY
10cm Radio Burst
Publié: 2024-09-14 16.30 UTC
10cm Radio Burst
Begin Time: 2024 Sep 14 1517 UTC
Maximum Time: 2024 Sep 14 1532 UTC
End Time: 2024 Sep 14 1555 UTC
Duration: 38 minutes
Peak Flux: 1000 sfu
Latest Penticton Noon Flux: 186 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.

SUMMARY
X-ray Event exceeded X1
Publié: 2024-09-14 15.53 UTC
X-ray Event exceeded X1
Begin Time: 2024 Sep 14 1513 UTC
Maximum Time: 2024 Sep 14 1529 UTC
End Time: 2024 Sep 14 1547 UTC
X-ray Class: X4.5
Optical Class: 2b
Location: S18E62
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

ALERT
X-Ray Flux exceeded M5
Publié: 2024-09-14 15.21 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Sep 14 1518 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Geomagnetic K-index of 4
Publié: 2024-09-14 01.33 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Sep 14 0130 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.

ALERT
Geomagnetic K-index of 6
Publié: 2024-09-13 22.44 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 Sep 13 2244 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 6 expected
Publié: 2024-09-13 22.41 UTC
Geomagnetic K-Index of 6 expected
Valid From: 2024 Sep 13 2240 UTC
Valid To: 2024 Sep 14 1200 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 5
Publié: 2024-09-13 22.14 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 13 2213 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-13 21.59 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4690
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 14 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.

WARNING
Geomagnetic K-index of 5 expected
Publié: 2024-09-13 21.58 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 Sep 13 2158 UTC
Valid To: 2024 Sep 14 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.

WATCH
Geomagnetic Storm Category G1 Predicted
Publié: 2024-09-13 17.07 UTC
Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Sep 14: G1 (Minor) Sep 15: None (Below G1) Sep 16: 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.

ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Publié: 2024-09-13 17.01 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2024 Sep 13 1645 UTC
Station: GOES16

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-13 14.55 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4689
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 13 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.

SUMMARY
X-ray Event exceeded M5
Publié: 2024-09-13 07.38 UTC
X-ray Event exceeded M5
Begin Time: 2024 Sep 13 0638 UTC
Maximum Time: 2024 Sep 13 0656 UTC
End Time: 2024 Sep 13 0734 UTC
X-ray Class: M5.4
Location: S14W90
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Publié: 2024-09-13 06.56 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Sep 13 0652 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Publié: 2024-09-13 05.29 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1924
Valid From: 2024 Sep 12 0419 UTC
Now Valid Until: 2024 Sep 13 1200 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: 2024-09-13 05.28 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4688
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 13 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.

ALERT
Geomagnetic K-index of 5
Publié: 2024-09-13 05.01 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 13 0456 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: 2024-09-13 02.30 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4687
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 13 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.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Publié: 2024-09-13 02.29 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1923
Valid From: 2024 Sep 12 0419 UTC
Now Valid Until: 2024 Sep 13 0600 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.

ALERT
Geomagnetic K-index of 5
Publié: 2024-09-13 02.08 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 13 0201 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 4
Publié: 2024-09-13 00.41 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Sep 13 0038 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.

ALERT
Geomagnetic K-index of 5
Publié: 2024-09-12 23.49 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 12 2335 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.

ALERT
Geomagnetic K-index of 4
Publié: 2024-09-12 22.11 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Sep 12 2208 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.

ALERT
Geomagnetic K-index of 7
Publié: 2024-09-12 19.53 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 Sep 12 1924 UTC
Synoptic Period: 1800-2100 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: 2024-09-12 19.05 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 Sep 12 1858 UTC
Synoptic Period: 1800-2100 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: 2024-09-12 18.44 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 12 1841 UTC
Synoptic Period: 1800-2100 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 6
Publié: 2024-09-12 16.28 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 Sep 12 1623 UTC
Synoptic Period: 1500-1800 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: 2024-09-12 15.48 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 12 1545 UTC
Synoptic Period: 1500-1800 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.

SUMMARY
X-ray Event exceeded M5
Publié: 2024-09-12 15.09 UTC
X-ray Event exceeded M5
Begin Time: 2024 Sep 12 1431 UTC
Maximum Time: 2024 Sep 12 1443 UTC
End Time: 2024 Sep 12 1447 UTC
X-ray Class: M6.8
Optical Class: na
Location: S15W87
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
Geomagnetic K-index of 7
Publié: 2024-09-12 14.46 UTC
Geomagnetic K-index of 7
Threshold Reached: 2024 Sep 12 1443 UTC
Synoptic Period: 1200-1500 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
X-Ray Flux exceeded M5
Publié: 2024-09-12 14.45 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Sep 12 1442 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Geomagnetic K-index of 6
Publié: 2024-09-12 13.48 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 Sep 12 1344 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.

WARNING
Geomagnetic K-index of 7 or greater expected
Publié: 2024-09-12 13.33 UTC
Geomagnetic K-index of 7 or greater expected
Valid From: 2024 Sep 12 1332 UTC
Valid To: 2024 Sep 12 2100 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater

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: 2024-09-12 13.24 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 12 1318 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.

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Publié: 2024-09-12 13.02 UTC
Geomagnetic K-Index of 6 expected
Extension to Serial Number: 541
Valid From: 2024 Sep 12 0755 UTC
Now Valid Until: 2024 Sep 12 2359 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: 2024-09-12 13.02 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1922
Valid From: 2024 Sep 12 0419 UTC
Now Valid Until: 2024 Sep 13 0300 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: 2024-09-12 13.02 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4686
Valid From: 2024 Sep 12 0355 UTC
Now Valid Until: 2024 Sep 13 0600 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 6
Publié: 2024-09-12 11.28 UTC
Geomagnetic K-index of 6
Threshold Reached: 2024 Sep 12 1128 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: 2024-09-12 10.10 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 12 1010 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.

SUMMARY
X-ray Event exceeded X1
Publié: 2024-09-12 10.05 UTC
X-ray Event exceeded X1
Begin Time: 2024 Sep 12 0931 UTC
Maximum Time: 2024 Sep 12 0943 UTC
End Time: 2024 Sep 12 0951 UTC
X-ray Class: X1.3
Location: S16E90
NOAA Scale: R3 - Strong

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

SUMMARY
10cm Radio Burst
Publié: 2024-09-12 09.56 UTC
10cm Radio Burst
Begin Time: 2024 Sep 12 0939 UTC
Maximum Time: 2024 Sep 12 0940 UTC
End Time: 2024 Sep 12 0941 UTC
Duration: 2 minutes
Peak Flux: 240 sfu
Latest Penticton Noon Flux: 207 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
X-Ray Flux exceeded M5
Publié: 2024-09-12 09.45 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Sep 12 0939 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

ALERT
Geomagnetic K-index of 5
Publié: 2024-09-12 07.55 UTC
Geomagnetic K-index of 5
Threshold Reached: 2024 Sep 12 0754 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.

WARNING
Geomagnetic K-Index of 6 expected
Publié: 2024-09-12 07.55 UTC
Geomagnetic K-Index of 6 expected
Valid From: 2024 Sep 12 0755 UTC
Valid To: 2024 Sep 12 1500 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.

SUMMARY
10cm Radio Burst
Publié: 2024-09-12 05.11 UTC
10cm Radio Burst
Begin Time: 2024 Sep 12 0431 UTC
Maximum Time: 2024 Sep 12 0431 UTC
End Time: 2024 Sep 12 0431 UTC
Duration: 1 minutes
Peak Flux: 230 sfu
Latest Penticton Noon Flux: 207 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.

WARNING
Geomagnetic K-index of 5 expected
Publié: 2024-09-12 04.19 UTC
Geomagnetic K-index of 5 expected
Valid From: 2024 Sep 12 0419 UTC
Valid To: 2024 Sep 12 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
Geomagnetic Sudden Impulse
Publié: 2024-09-12 04.01 UTC
Geomagnetic Sudden Impulse
Observed: 2024 Sep 12 0350 UTC
Deviation: 32 nT
Station: CNB

ALERT
Geomagnetic K-index of 4
Publié: 2024-09-12 03.57 UTC
Geomagnetic K-index of 4
Threshold Reached: 2024 Sep 12 0357 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: 2024-09-12 03.55 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Sep 12 0355 UTC
Valid To: 2024 Sep 12 1800 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: 2024-09-12 03.15 UTC
Geomagnetic Sudden Impulse expected
Valid From: 2024 Sep 12 0332 UTC
Valid To: 2024 Sep 12 0412 UTC
IP Shock Passage Observed: 2024 Sep 12 0254 UTC

SUMMARY
X-ray Event exceeded M5
Publié: 2024-09-12 00.38 UTC
X-ray Event exceeded M5
Begin Time: 2024 Sep 11 2349 UTC
Maximum Time: 2024 Sep 12 0012 UTC
End Time: 2024 Sep 12 0032 UTC
X-ray Class: M5.0
Location: S14W75
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
X-Ray Flux exceeded M5
Publié: 2024-09-12 00.16 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2024 Sep 12 0011 UTC
NOAA Scale: R2 - Moderate

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

WARNING
Geomagnetic K-index of 4 expected
Publié: 2024-09-11 16.43 UTC
Geomagnetic K-index of 4 expected
Valid From: 2024 Sep 11 1642 UTC
Valid To: 2024 Sep 11 2359 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.

WATCH
Geomagnetic Storm Category G2 Predicted
Publié: 2024-09-10 17.37 UTC
Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Sep 11: G1 (Minor) Sep 12: G1 (Minor) Sep 13: G2 (Moderate)

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.

SUMMARY
Proton Event 10MeV Integral Flux exceeded 10pfu
Publié: 2024-09-10 11.54 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 Sep 09 1640 UTC
Maximum Time: 2024 Sep 09 2250 UTC
End Time: 2024 Sep 10 0555 UTC
Maximum 10MeV Flux: 34 pfu
NOAA Scale: S1 - Minor

ALERT
Type IV Radio Emission
Publié: 2024-09-10 00.41 UTC
Type IV Radio Emission
Begin Time: 2024 Sep 09 2353 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.

ALERT
Type II Radio Emission
Publié: 2024-09-10 00.03 UTC
Type II Radio Emission
Begin Time: 2024 Sep 09 2345 UTC
Estimated Velocity: 408 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.

EXTENDED WARNING
Proton 10MeV Integral Flux above 10pfu expected
Publié: 2024-09-09 19.43 UTC
Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 574
Valid From: 2024 Sep 09 0750 UTC
Now Valid Until: 2024 Sep 10 1200 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.

ALERT
Proton Event 10MeV Integral Flux exceeded 10pfu
Publié: 2024-09-09 17.22 UTC
Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 Sep 09 1640 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
Publié: 2024-09-09 07.49 UTC
Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2024 Sep 09 0750 UTC
Valid To: 2024 Sep 09 2000 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.

ALERT
Type II Radio Emission
Publié: 2024-09-09 05.54 UTC
Type II Radio Emission
Begin Time: 2024 Sep 09 0510 UTC
Estimated Velocity: 668 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.

WATCH
Geomagnetic Storm Category G2 Predicted
Publié: 2024-09-08 07.53 UTC
Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Sep 09: None (Below G1) Sep 10: G2 (Moderate) Sep 11: G1 (Minor)

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.

ALERT
Type II Radio Emission
Publié: 2024-09-08 01.29 UTC
Type II Radio Emission
Begin Time: 2024 Sep 08 0057 UTC
Estimated Velocity: 924 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.

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
24/09/05 241 167 1490 0 * 16 6 0 5 0 0 0
24/09/06 249 188 1280 2 * 13 0 0 3 1 0 0
24/09/07 222 179 1340 3 * 7 1 0 11 2 0 0
24/09/08 228 176 1095 2 * 3 1 0 4 1 0 0
24/09/09 215 213 1025 1 * 0 7 0 0 0 1 0
24/09/10 205 147 1010 0 * 4 2 0 4 2 0 0
24/09/11 207 179 1150 2 * 6 6 0 11 1 1 0
24/09/12 201 160 1020 0 * 8 6 1 18 1 0 0
24/09/13 186 127 710 1 * 4 11 0 9 0 0 0
24/09/14 172 136 750 1 * 3 2 1 6 0 1 0
24/09/15 173 68 290 0 * 6 0 0 2 1 0 0
24/09/16 169 103 660 2 * 4 0 0 3 0 0 0
24/09/17 165 140 590 1 * 3 0 0 0 0 0 0
24/09/18 163 93 520 1 * 4 0 0 4 0 0 0
24/09/19 161 109 580 1 * 4 0 0 3 0 0 0
24/09/20 154 113 600 3 * 1 0 0 1 0 0 0
24/09/21 158 117 640 0 * 3 0 0 2 0 0 0
24/09/22 163 114 650 1 * 1 1 0 5 0 1 0
24/09/23 167 224 690 1 * 2 1 0 2 0 0 0
24/09/24 172 123 730 0 * 7 0 0 5 0 0 0
24/09/25 174 160 720 1 * 2 1 0 2 1 0 0
24/09/26 181 189 740 2 * 4 1 0 4 1 0 0
24/09/27 186 122 530 1 * 6 0 0 13 0 0 0
24/09/28 195 148 630 2 * 5 0 0 10 0 0 0
24/09/29 197 154 660 1 * 3 3 0 7 1 0 0
24/09/30 214 150 580 1 * 8 1 0 21 0 1 0
24/10/01 245 196 840 3 * 8 2 1 22 1 1 0
24/10/02 275 194 1360 1 * 10 6 0 31 2 1 0
24/10/03 312 229 1780 0 * 2 8 1 29 0 1 0
24/10/04 291 180 3520 1 * 1 5 0 16 3 0 0
Moyenne/Total 201 153 939 35 148 71 4 253 18 8 0

Graphique de synthèse

éclairs

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



Aujourd’hui


0h
UTC
3h
UTC
6h
UTC
9h
UTC
12h
UTC
15h
UTC
18h
UTC
21h
UTC
2. 67 1. 33 2.



Data


Estimated Planetary

Estimated Planetary

Date A K-indices (UTC)
0h 3h 6h 9h 12h 15h 18h 21h
24/09/06 8 1. 33 0. 67 2.
24/09/07 7 2. 67 2. 00 1.
24/09/08 9 2. 67 2. 33 1.
24/09/09 9 2. 67 1. 67 2.
24/09/10 7 2. 67 2. 00 1.
24/09/11 8 1. 33 1. 33 1.
24/09/12 67 2. 00 4. 00 5.
24/09/13 37 5. 00 4. 67 4.
24/09/14 21 4. 00 3. 67 2.
24/09/15 19 2. 00 4. 00 4.
24/09/16 23 3. 67 4. 00 4.
24/09/17 71 7. 67 6. 67 5.
24/09/18 12 4. 00 2. 33 1.
24/09/19 20 4. 67 2. 67 2.
24/09/20 7 1. 33 1. 33 1.
24/09/21 6 2. 00 2. 00 2.
24/09/22 5 1. 33 0. 67 0.
24/09/23 13 1. 67 1. 00 1.
24/09/24 17 3. 67 2. 67 2.
24/09/25 32 4. 33 5. 00 4.
24/09/26 13 4. 33 3. 67 2.
24/09/27 7 1. 67 2. 67 2.
24/09/28 7 0. 33 0. 33 1.
24/09/29 16 3. 33 2. 67 3.
24/09/30 11 4. 33 2. 00 1.
24/10/01 6 2. 33 2. 33 1.
24/10/02 7 2. 67 2. 33 1.
24/10/03 8 1. 33 1. 67 2.
24/10/04 8 2. 33 1. 67 1.
24/10/05 9 2. 67 1. 33 2.

Middle Latitude

Date A K-indices
24/09/06 8 1 0 2 3 3 2 2 2
24/09/07 9 2 2 2 2 3 3 2 1
24/09/08 19 2 2 1 2 3 3 6 3
24/09/09 9 2 2 3 2 2 2 2 3
24/09/10 7 2 1 1 2 2 2 3 1
24/09/11 8 1 1 2 2 3 2 3 2
24/09/12 36 1 3 4 5 6 5 5 3
24/09/13 22 5 4 3 3 3 3 3 4
24/09/14 22 3 3 2 5 5 3 3 3
24/09/15 16 2 4 3 3 4 3 3 2
24/09/16 19 3 3 4 4 4 2 2 4
24/09/17 39 6 5 5 5 5 3 3 2
24/09/18 10 4 2 1 2 2 2 1 3
24/09/19 15 4 2 1 3 4 3 3 2
24/09/20 6 1 1 0 2 2 2 2 3
24/09/21 6 2 1 2 1 2 2 2 1
24/09/22 3 0 0 0 1 2 2 2 1
24/09/23 9 1 1 2 3 3 3 2 2
24/09/24 12 3 2 2 2 2 2 3 4
24/09/25 24 4 4 4 4 4 4 3 3
24/09/26 11 4 3 2 2 3 2 2 0
24/09/27 5 1 2 2 2 2 2 1 0
24/09/28 5 0 0 1 1 2 3 2 2
24/09/29 17 3 2 4 4 4 2 2 3
24/09/30 9 3 1 1 1 3 3 2 2
24/10/01 5 1 2 2 1 2 1 2 1
24/10/02 6 2 2 1 2 2 1 2 1
24/10/03 8 0 1 1 2 4 2 2 2
24/10/04 6 1 1 1 1 2 2 2 3
24/10/05 1 1 2

High Latitude

Date A K-indices
24/09/06 7 1 0 2 2 4 1 1 1
24/09/07 6 2 2 0 1 3 1 2 1
24/09/08 5 2 2 1 1 2 1 2 1
24/09/09 6 2 1 2 2 1 2 2 2
24/09/10 5 2 2 1 1 2 1 2 1
24/09/11 4 1 1 0 1 2 2 2 1
24/09/12 51 2 4 5 5 6 4 7 4
24/09/13 40 4 5 5 5 5 4 4 5
24/09/14 44 3 3 3 7 7 2 3 2
24/09/15 29 3 5 5 4 5 4 3 2
24/09/16 43 3 4 7 6 4 3 3 4
24/09/17 65 5 7 6 6 6 5 4 3
24/09/18 11 3 2 2 2 4 2 1 3
24/09/19 39 3 4 2 6 6 6 3 2
24/09/20 6 1 1 2 3 0 1 2 2
24/09/21 7 2 1 3 3 0 1 2 1
24/09/22 4 1 0 0 3 1 2 1 0
24/09/23 24 1 0 0 5 6 5 2 1
24/09/24 27 3 3 3 5 5 5 3 3
24/09/25 56 4 4 6 6 5 7 4 3
24/09/26 16 3 4 3 4 4 3 1 0
24/09/27 18 1 2 4 5 5 2 0 0
24/09/28 13 0 0 2 4 3 5 1 1
24/09/29 20 2 2 5 5 4 2 2 2
24/09/30 8 4 2 1 1 1 2 2 2
24/10/01 3 1 2 1 0 0 2 1 1
24/10/02 2 1 2 5 5 0 1
24/10/03 7 0 1 1 3 3 2 2 1
24/10/04 3 1 1 1 0 1 1 1 2
24/10/05 2 0 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
Source de données: NOAA, Wikipedia

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