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ALERT
Geomagnetic K-index of 4
Issued: 09.02.2023 04.26 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Feb 09 0415 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 4 expected
Issued: 09.02.2023 04.14 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 09 0414 UTC
Valid To: 2023 Feb 09 0900 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 4 expected
Issued: 08.02.2023 22.01 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 08 2201 UTC
Valid To: 2023 Feb 09 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: 08.02.2023 13.02 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2023 Feb 08 1300 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: 08.02.2023 11.32 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4264
Valid From: 2023 Feb 08 0455 UTC
Now Valid Until: 2023 Feb 08 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.

ALERT
Geomagnetic K-index of 4
Publié: 08.02.2023 05.12 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Feb 08 0505 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: 08.02.2023 04.56 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 08 0455 UTC
Valid To: 2023 Feb 08 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.

SUMMARY
X-ray Event exceeded M5
Publié: 08.02.2023 00.20 UTC
X-ray Event exceeded M5
Begin Time: 2023 Feb 07 2246 UTC
Maximum Time: 2023 Feb 07 2307 UTC
End Time: 2023 Feb 07 2309 UTC
X-ray Class: M6.3
Location: N31W01
NOAA Scale: R2 - Moderate

Comment: This was a double-peaked flare/event. The start time is based on the first M3.9 flare. The maximum and end times are based on the second, larger, M6.3 flare.

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: 07.02.2023 23.10 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2023 Feb 07 2309 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 4 expected
Publié: 07.02.2023 14.58 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4262
Valid From: 2023 Feb 06 1925 UTC
Now Valid Until: 2023 Feb 07 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 4 expected
Publié: 07.02.2023 02.57 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4261
Valid From: 2023 Feb 06 1925 UTC
Now Valid Until: 2023 Feb 07 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 4
Publié: 06.02.2023 21.01 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Feb 06 2058 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: 06.02.2023 19.24 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 06 1925 UTC
Valid To: 2023 Feb 07 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: 06.02.2023 08.55 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4259
Valid From: 2023 Feb 06 0220 UTC
Now Valid Until: 2023 Feb 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.

ALERT
Geomagnetic K-index of 4
Publié: 06.02.2023 02.48 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Feb 06 0248 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: 06.02.2023 02.22 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 06 0220 UTC
Valid To: 2023 Feb 06 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: 03.02.2023 17.07 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 03 1706 UTC
Valid To: 2023 Feb 04 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
Geomagnetic K-index of 4
Publié: 02.02.2023 03.01 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Feb 02 0259 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: 02.02.2023 01.23 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 02 0122 UTC
Valid To: 2023 Feb 02 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.

SUMMARY
Geomagnetic Sudden Impulse
Publié: 01.02.2023 19.03 UTC
Geomagnetic Sudden Impulse
Observed: 2023 Feb 01 1854 UTC
Deviation: 10 nT
Station: CNB

WARNING
Geomagnetic Sudden Impulse expected
Publié: 01.02.2023 18.22 UTC
Geomagnetic Sudden Impulse expected
Valid From: 2023 Feb 01 1830 UTC
Valid To: 2023 Feb 01 1930 UTC
IP Shock Passage Observed: 2023 Feb 01 1753 UTC

WARNING
Geomagnetic K-index of 4 expected
Publié: 31.01.2023 17.50 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 31 1749 UTC
Valid To: 2023 Jan 31 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.

WARNING
Geomagnetic K-index of 4 expected
Publié: 31.01.2023 08.22 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 31 0822 UTC
Valid To: 2023 Jan 31 1200 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 4 expected
Publié: 26.01.2023 18.39 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 26 1840 UTC
Valid To: 2023 Jan 27 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: 26.01.2023 03.26 UTC
Type II Radio Emission
Begin Time: 2023 Jan 26 0247 UTC
Estimated Velocity: 317 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: 24.01.2023 04.41 UTC
Type II Radio Emission
Begin Time: 2023 Jan 24 0324 UTC
Estimated Velocity: 368 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.

WARNING
Geomagnetic K-index of 4 expected
Publié: 22.01.2023 20.49 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 22 2048 UTC
Valid To: 2023 Jan 23 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: 21.01.2023 19.31 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 21 1930 UTC
Valid To: 2023 Jan 22 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.

ALERT
Geomagnetic K-index of 4
Publié: 21.01.2023 06.01 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Jan 21 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: 21.01.2023 06.01 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 21 0559 UTC
Valid To: 2023 Jan 21 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: 18.01.2023 17.59 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4249
Valid From: 2023 Jan 17 2328 UTC
Now Valid Until: 2023 Jan 18 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: 18.01.2023 14.55 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4248
Valid From: 2023 Jan 17 2328 UTC
Now Valid Until: 2023 Jan 18 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: 18.01.2023 07.54 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4247
Valid From: 2023 Jan 17 2328 UTC
Now Valid Until: 2023 Jan 18 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.

WARNING
Geomagnetic K-index of 5 expected
Publié: 18.01.2023 04.16 UTC
Geomagnetic K-index of 5 expected
Valid From: 2023 Jan 18 0415 UTC
Valid To: 2023 Jan 18 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: 17.01.2023 23.31 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Jan 17 2330 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: 17.01.2023 23.29 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 17 2328 UTC
Valid To: 2023 Jan 18 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: 16.01.2023 11.42 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4245
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 16 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.

ALERT
Geomagnetic K-index of 5
Publié: 15.01.2023 23.06 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Jan 15 2306 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: 15.01.2023 22.59 UTC
Geomagnetic K-index of 5 expected
Valid From: 2023 Jan 15 2300 UTC
Valid To: 2023 Jan 16 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 15.01.2023 22.59 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4244
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 15.01.2023 17.56 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4243
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 16 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 4 expected
Publié: 15.01.2023 10.14 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4242
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 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.

SUMMARY
X-ray Event exceeded M5
Publié: 15.01.2023 10.07 UTC
X-ray Event exceeded M5
Begin Time: 2023 Jan 15 0308 UTC
Maximum Time: 2023 Jan 15 0342 UTC
End Time: 2023 Jan 15 0408 UTC
X-ray Class: M6.0
Optical Class: sf
Location: N12E54
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.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Publié: 15.01.2023 08.55 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1733
Valid From: 2023 Jan 15 0255 UTC
Now Valid Until: 2023 Jan 15 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.

ALERT
Type II Radio Emission
Publié: 15.01.2023 03.51 UTC
Type II Radio Emission
Begin Time: 2023 Jan 14 2314 UTC
Estimated Velocity: 212 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: 15.01.2023 03.49 UTC
Type II Radio Emission
Begin Time: 2023 Jan 15 0137 UTC
Estimated Velocity: 337 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: 15.01.2023 03.49 UTC
Type II Radio Emission
Begin Time: 2023 Jan 15 0310 UTC
Estimated Velocity: 223 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: 15.01.2023 03.34 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2023 Jan 15 0332 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: 15.01.2023 02.57 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Jan 15 0257 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: 15.01.2023 02.54 UTC
Geomagnetic K-index of 5 expected
Valid From: 2023 Jan 15 0255 UTC
Valid To: 2023 Jan 15 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 15.01.2023 02.54 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4241
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Publié: 14.01.2023 20.58 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4240
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 15 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
Type II Radio Emission
Publié: 14.01.2023 13.32 UTC
Type II Radio Emission
Begin Time: 2023 Jan 14 1246 UTC
Estimated Velocity: 398 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
Geomagnetic K-index of 4 expected
Publié: 14.01.2023 05.27 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4239
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 14 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.

ALERT
Geomagnetic K-index of 4
Publié: 13.01.2023 22.26 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Jan 13 2220 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: 13.01.2023 19.36 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 13 1936 UTC
Valid To: 2023 Jan 14 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.

ALERT
Type II Radio Emission
Publié: 13.01.2023 14.59 UTC
Type II Radio Emission
Begin Time: 2023 Jan 13 1410 UTC
Estimated Velocity: 401 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: 13.01.2023 10.56 UTC
Type II Radio Emission
Begin Time: 2023 Jan 13 1020 UTC
Estimated Velocity: 381 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: 11.01.2023 21.29 UTC
Type II Radio Emission
Begin Time: 2023 Jan 11 2057 UTC
Estimated Velocity: 899 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: 11.01.2023 04.29 UTC
Type IV Radio Emission
Begin Time: 2023 Jan 11 0336 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
X-ray Event exceeded M5
Publié: 11.01.2023 02.39 UTC
X-ray Event exceeded M5
Begin Time: 2023 Jan 11 0149 UTC
Maximum Time: 2023 Jan 11 0156 UTC
End Time: 2023 Jan 11 0201 UTC
X-ray Class: M5.6
Optical Class: 1b
Location: S13E53
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.

CANCEL SUMMARY
X-ray Event exceeded M5
Publié: 11.01.2023 02.37 UTC
X-ray Event exceeded M5
Cancel Serial Number: 167
Original Issue Time: 2023 Jan 11 0205 UTC

Comment: Issued with incorrect source location. Issuing new summary with correct information.

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: 11.01.2023 02.36 UTC
Type II Radio Emission
Begin Time: 2023 Jan 11 0153 UTC
Estimated Velocity: 628 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
10cm Radio Burst
Publié: 11.01.2023 02.11 UTC
10cm Radio Burst
Begin Time: 2023 Jan 11 0153 UTC
Maximum Time: 2023 Jan 11 0153 UTC
End Time: 2023 Jan 11 0154 UTC
Duration: 1 minutes
Peak Flux: 290 sfu
Latest Penticton Noon Flux: 193 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 M5
Publié: 11.01.2023 02.05 UTC
X-ray Event exceeded M5
Begin Time: 2023 Jan 11 0149 UTC
Maximum Time: 2023 Jan 11 0156 UTC
End Time: 2023 Jan 11 0201 UTC
X-ray Class: M5.6
Optical Class: sf
Location: N25E65
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: 11.01.2023 01.57 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2023 Jan 11 0155 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
Type IV Radio Emission
Publié: 11.01.2023 01.25 UTC
Type IV Radio Emission
Begin Time: 2023 Jan 11 0059 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: 10.01.2023 23.07 UTC
10cm Radio Burst
Begin Time: 2023 Jan 10 2246 UTC
Maximum Time: 2023 Jan 10 2246 UTC
End Time: 2023 Jan 10 2247 UTC
Duration: 1 minutes
Peak Flux: 320 sfu
Latest Penticton Noon Flux: 193 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 M5
Publié: 10.01.2023 23.06 UTC
X-ray Event exceeded M5
Begin Time: 2023 Jan 10 2239 UTC
Maximum Time: 2023 Jan 10 2247 UTC
End Time: 2023 Jan 10 2251 UTC
X-ray Class: X1
Optical Class: 2b
Location: N25E65
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.

SUMMARY
X-ray Event exceeded X1
Publié: 10.01.2023 23.00 UTC
X-ray Event exceeded X1
Begin Time: 2023 Jan 10 2239 UTC
Maximum Time: 2023 Jan 10 2247 UTC
End Time: 2023 Jan 10 2252 UTC
X-ray Class: X1
Optical Class: 2b
Location: N25E65
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: 10.01.2023 22.49 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2023 Jan 10 2246 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.

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
10-01-2023 193 201 2180 2 * 15 6 1 21 0 2 0
11-01-2023 195 183 2060 0 * 5 4 0 16 2 0 0
12-01-2023 212 151 1430 1 * 11 3 0 19 2 0 0
13-01-2023 209 181 1650 4 * 7 2 0 20 3 0 0
14-01-2023 228 170 1750 0 * 5 3 0 15 2 0 0
15-01-2023 234 177 1820 2 * 3 2 0 16 0 1 0
16-01-2023 228 186 2410 0 * 5 0 0 9 0 0 0
17-01-2023 222 185 2290 1 * 8 1 0 5 1 0 0
18-01-2023 220 164 2210 1 * 7 1 0 10 0 0 0
19-01-2023 219 166 2020 2 * 7 3 0 10 0 0 0
20-01-2023 218 197 1720 1 * 6 0 0 6 0 0 0
21-01-2023 209 194 1390 0 * 8 0 0 8 0 0 0
22-01-2023 199 166 1250 1 * 7 2 0 7 2 0 0
23-01-2023 189 144 1240 0 * 6 0 0 5 0 0 0
24-01-2023 180 127 1380 1 * 9 0 0 15 0 0 0
25-01-2023 172 136 1320 2 * 7 3 0 15 1 0 0
26-01-2023 151 104 280 0 * 10 1 0 7 0 0 0
27-01-2023 145 84 170 0 * 3 0 0 4 0 0 0
28-01-2023 138 76 120 2 * 4 0 0 2 0 0 0
29-01-2023 137 80 160 1 * 2 0 0 0 0 0 0
30-01-2023 136 67 290 1 * 11 0 0 8 0 0 0
31-01-2023 137 65 360 0 * 7 0 0 8 0 0 0
01-02-2023 134 89 320 1 * 4 0 0 4 0 0 0
02-02-2023 135 56 180 0 * 2 0 0 0 0 0 0
03-02-2023 135 74 190 2 * 4 0 0 3 1 0 0
04-02-2023 139 66 180 1 * 4 0 0 1 0 0 0
05-02-2023 144 79 200 1 * 3 0 0 4 0 0 0
06-02-2023 158 139 260 4 * 8 0 0 8 0 0 0
07-02-2023 185 110 425 0 * 13 2 0 10 2 0 0
08-02-2023 192 142 1290 2 * 6 4 0 15 2 1 0
Moyenne/Total 180 132 1085 33 197 37 1 271 18 4 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



Aujourd’hui


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3. 33 - 1. 00 - 1.



Data


Estimated Planetary

Estimated Planetary

Date A K-indices (UTC)
0h 3h 6h 9h 12h 15h 18h 21h
11-01-2023 9 2. 00 2. 67 2.
12-01-2023 9 3. 00 1. 67 2.
13-01-2023 12 2. 67 2. 00 2.
14-01-2023 11 3. 67 3. 67 2.
15-01-2023 30 5. 00 4. 00 4.
16-01-2023 14 4. 00 1. 67 3.
17-01-2023 6 0. 67 1. 67 1.
18-01-2023 15 4. 00 4. 00 3.
19-01-2023 7 0. 33 1. 33 3.
20-01-2023 6 1. 00 1. 00 0.
21-01-2023 17 3. 00 4. 33 3.
22-01-2023 9 2. 00 1. 67 2.
23-01-2023 7 0. 67 2. 00 1.
24-01-2023 4 1. 33 0. 67 1.
25-01-2023 7 0. 67 0. 67 0.
26-01-2023 11 1. 67 3. 00 3.
27-01-2023 9 1. 00 0. 67 1.
28-01-2023 10 3. 33 2. 67 2.
29-01-2023 5 1. 00 0. 33 2.
30-01-2023 5 1. 67 0. 33 1.
31-01-2023 9 0. 67 2. 33 3.
01-02-2023 6 1. 67 0. 33 0.
02-02-2023 6 3. 67 1. 67 0.
03-02-2023 9 2. 67 1. 67 0.
04-02-2023 6 2. 67 3. 00 1.
05-02-2023 5 0. 67 2. 33 0.
06-02-2023 18 3. 67 3. 67 2.
07-02-2023 20 4. 00 4. 00 3.
08-02-2023 18 3. 33 3. 67 2.
09-02-2023 18 3. 33 - 1. 00 - 1.

Middle Latitude

Date A K-indices
11-01-2023 8 1 2 2 2 2 3 2
12-01-2023 8 3 1 2 1 2 3 2 2
13-01-2023 10 2 1 2 2 2 3 2 4
14-01-2023 9 3 3 2 1 2 2 1 3
15-01-2023 17 4 3 3 3 3 3 3 3
16-01-2023 10 3 1 2 3 3 3 1 1
17-01-2023 5 0 1 1 1 2 1 1 3
18-01-2023 11 3 3 3 2 3 3 1 1
19-01-2023 6 0 2 2 2 3 2 1 1
20-01-2023 4 0 1 0 0 2 3 2 1
21-01-2023 11 2 3 3 2 3 2 3 2
22-01-2023 7 1 1 2 2 2 2 3 1
23-01-2023 5 0 2 0 0 3 2 1 2
24-01-2023 3 1 0 1 1 2 2 1 0
25-01-2023 5 0 1 0 2 3 2 2 1
26-01-2023 9 1 2 3 2 3 3 2 1
27-01-2023 6 0 0 2 2 2 3 2 2
28-01-2023 8 3 2 2 1 2 3 2 1
29-01-2023 5 1 0 2 1 2 2 2 1
30-01-2023 4 1 1 1 1 1 1 1 2
31-01-2023 6 1 2 2 2 1 2 2 1
01-02-2023 3 1 1 0 0 1 1 2 2
02-02-2023 2 2 1 0 0 1 1 1 0
03-02-2023 6 2 1 0 1 2 3 2 1
04-02-2023 5 2 3 0 1 1 1 1 1
05-02-2023 3 0 2 0 1 1 1 1 2
06-02-2023 13 3 2 3 3 3 2 3 3
07-02-2023 12 3 3 3 3 3 2 2 2
08-02-2023 12 2 4 2 3 2 2 3 2
09-02-2023 2

High Latitude

Date A K-indices
11-01-2023 8 2 1 2 3 3 2 2 1
12-01-2023 7 1 1 3 3 2 1 2 1
13-01-2023 18 1 1 4 5 4 1 3 3
14-01-2023 6 3 3 2 1 0 0 1 2
15-01-2023 53 3 3 6 7 5 4 5 5
16-01-2023 18 3 1 3 5 4 4 2 0
17-01-2023 3 0 1 0 1 2 0 0 2
18-01-2023 23 2 2 4 6 5 3 1 0
19-01-2023 12 0 1 4 3 5 0 0 0
20-01-2023 7 0 0 0 2 3 4 1 0
21-01-2023 17 1 3 4 3 4 3 4 1
22-01-2023 15 1 2 3 3 4 4 3 2
23-01-2023 12 0 1 0 0 5 4 2 2
24-01-2023 4 1 0 0 3 2 2 0 0
25-01-2023 20 0 0 0 4 5 6 2 0
26-01-2023 16 1 1 3 4 5 3 3 0
27-01-2023 16 0 0 2 5 4 4 3 2
28-01-2023 11 2 1 2 3 4 3 2 1
29-01-2023 3 1 0 1 1 2 2 0 0
30-01-2023 2 0 0 0 2 0 0 1 1
31-01-2023 10 1 1 3 3 2 3 3 1
01-02-2023 3 0 1 2 1
02-02-2023 2 2 1 0 2 0 0 0 0
03-02-2023 6 1 0 0 0 2 4 2 1
04-02-2023 6 2 1 2 0 4 1 0 0
05-02-2023 2 0 0 0 2 1 1 1 0
06-02-2023 16 1 3 3 4 4 3 3 2
07-02-2023 27 3 4 2 6 4 4 4 2
08-02-2023 25 2 4 3 5 5 4 3 3
09-02-2023 3

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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