Avvisi e Osservazioni del SWPC della NOAA

Il Centro di Predizione Meteorologico Spaziale dell'Amministrazione Atmosferica e Oceanica Nazionale (SWPC della NOAA) è l'agenzia governativa meteorologica spaziale ufficiale degli Stati Uniti che fornisce allerte e avvisi per i disturbi meteorologici spaziali. Sotto troverete le ultime allerte e avvisi meteorologici spaziali emessi dal SWPC della NOAA.

giovedì, 20 febbraio AM

09:09 UTC

Space Weather Message Code: SUM10R
Serial Number: 860
Issue Time: 2025 Feb 20 0909 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2025 Feb 20 0444 UTC
Maximum Time: 2025 Feb 20 0444 UTC
End Time: 2025 Feb 20 0445 UTC
Duration: 1 minutes
Peak Flux: 200 sfu
Latest Penticton Noon Flux: 178 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.

08:37 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1401
Issue Time: 2025 Feb 20 0837 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Feb 19 2338 UTC
Estimated Velocity: 553 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.

mercoledì, 19 febbraio PM

20:58 UTC

Space Weather Message Code: ALTK04
Serial Number: 2528
Issue Time: 2025 Feb 19 2058 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Feb 19 2055 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

20:25 UTC

Space Weather Message Code: WARK04
Serial Number: 4845
Issue Time: 2025 Feb 19 2025 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Feb 19 2024 UTC
Valid To: 2025 Feb 20 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

08:04 UTC

Space Weather Message Code: WARK05
Serial Number: 1977
Issue Time: 2025 Feb 19 0804 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Feb 19 0804 UTC
Valid To: 2025 Feb 19 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

07:37 UTC

Space Weather Message Code: WARK04
Serial Number: 4844
Issue Time: 2025 Feb 19 0737 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4843
Valid From: 2025 Feb 18 2234 UTC
Now Valid Until: 2025 Feb 19 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

01:49 UTC

Space Weather Message Code: ALTK05
Serial Number: 1699
Issue Time: 2025 Feb 19 0149 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Feb 19 0149 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

00:02 UTC

Space Weather Message Code: ALTK05
Serial Number: 1698
Issue Time: 2025 Feb 19 0002 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Feb 18 2359 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

martedì, 18 febbraio PM

22:43 UTC

Space Weather Message Code: WARK05
Serial Number: 1975
Issue Time: 2025 Feb 18 2243 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Feb 18 2242 UTC
Valid To: 2025 Feb 19 0300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

22:36 UTC

Space Weather Message Code: ALTK04
Serial Number: 2527
Issue Time: 2025 Feb 18 2236 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Feb 18 2236 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

22:35 UTC

Space Weather Message Code: WARK04
Serial Number: 4843
Issue Time: 2025 Feb 18 2235 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Feb 18 2234 UTC
Valid To: 2025 Feb 19 0900 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

08:55 UTC

Space Weather Message Code: WARK04
Serial Number: 4842
Issue Time: 2025 Feb 18 0855 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4841
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 18 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

lunedì, 17 febbraio PM

23:47 UTC

Space Weather Message Code: WARK04
Serial Number: 4841
Issue Time: 2025 Feb 17 2347 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4840
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 18 0900 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

11:24 UTC

Space Weather Message Code: WARK04
Serial Number: 4840
Issue Time: 2025 Feb 17 1124 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4839
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 17 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

04:44 UTC

Space Weather Message Code: WARK04
Serial Number: 4839
Issue Time: 2025 Feb 17 0444 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4838
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 17 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

03:47 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3425
Issue Time: 2025 Feb 17 0347 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3424
Begin Time: 2025 Feb 11 1405 UTC
Yesterday Maximum 2MeV Flux: 3934 pfu



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

domenica, 16 febbraio PM

20:20 UTC

Space Weather Message Code: WARK04
Serial Number: 4838
Issue Time: 2025 Feb 16 2020 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4837
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 17 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

14:22 UTC

Space Weather Message Code: WARK04
Serial Number: 4837
Issue Time: 2025 Feb 16 1422 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4836
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 16 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

04:37 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3424
Issue Time: 2025 Feb 16 0437 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3423
Begin Time: 2025 Feb 11 1405 UTC
Yesterday Maximum 2MeV Flux: 4741 pfu



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

04:18 UTC

Space Weather Message Code: WARK04
Serial Number: 4836
Issue Time: 2025 Feb 16 0418 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4835
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 16 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

sabato, 15 febbraio PM

21:15 UTC

Space Weather Message Code: WATA20
Serial Number: 1030
Issue Time: 2025 Feb 15 2115 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 16: G1 (Minor) Feb 17: None (Below G1) Feb 18: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

18:22 UTC

Space Weather Message Code: ALTK05
Serial Number: 1697
Issue Time: 2025 Feb 15 1822 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Feb 15 1759 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:33 UTC

Space Weather Message Code: WARK05
Serial Number: 1974
Issue Time: 2025 Feb 15 1733 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1973
Valid From: 2025 Feb 15 1015 UTC
Now Valid Until: 2025 Feb 15 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:32 UTC

Space Weather Message Code: WARK04
Serial Number: 4835
Issue Time: 2025 Feb 15 1732 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4834
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 16 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

10:34 UTC

Space Weather Message Code: WARK06
Serial Number: 560
Issue Time: 2025 Feb 15 1034 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Feb 15 1030 UTC
Valid To: 2025 Feb 15 1500 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

10:30 UTC

Space Weather Message Code: ALTK05
Serial Number: 1696
Issue Time: 2025 Feb 15 1030 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Feb 15 1024 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

10:09 UTC

Space Weather Message Code: WARK05
Serial Number: 1973
Issue Time: 2025 Feb 15 1009 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Feb 15 1015 UTC
Valid To: 2025 Feb 15 1800 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

04:51 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3423
Issue Time: 2025 Feb 15 0451 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3422
Begin Time: 2025 Feb 11 1405 UTC
Yesterday Maximum 2MeV Flux: 6603 pfu



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

04:15 UTC

Space Weather Message Code: WARK04
Serial Number: 4834
Issue Time: 2025 Feb 15 0415 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4833
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 15 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

venerdì, 14 febbraio PM

21:51 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1400
Issue Time: 2025 Feb 14 2151 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Feb 14 2107 UTC
Estimated Velocity: 941 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.

19:46 UTC

Space Weather Message Code: WATA20
Serial Number: 1029
Issue Time: 2025 Feb 14 1946 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 15: G1 (Minor) Feb 16: None (Below G1) Feb 17: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Comment: Isolated periods of G1 (Minor) geomagnetic storming are likely early on 15 Feb UTC.

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

15:05 UTC

Space Weather Message Code: ALTK05
Serial Number: 1695
Issue Time: 2025 Feb 14 1505 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Feb 14 1459 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:52 UTC

Space Weather Message Code: WARK05
Serial Number: 1972
Issue Time: 2025 Feb 14 1452 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1971
Valid From: 2025 Feb 13 2320 UTC
Now Valid Until: 2025 Feb 14 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:51 UTC

Space Weather Message Code: WARK04
Serial Number: 4833
Issue Time: 2025 Feb 14 1451 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4832
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 15 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

12:47 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3422
Issue Time: 2025 Feb 14 1247 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3421
Begin Time: 2025 Feb 11 1405 UTC
Yesterday Maximum 2MeV Flux: 2426 pfu



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

03:03 UTC

Space Weather Message Code: ALTK05
Serial Number: 1694
Issue Time: 2025 Feb 14 0303 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Feb 14 0259 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

giovedì, 13 febbraio PM

23:22 UTC

Space Weather Message Code: WARK04
Serial Number: 4832
Issue Time: 2025 Feb 13 2322 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4831
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 14 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

23:22 UTC

Space Weather Message Code: WARK05
Serial Number: 1971
Issue Time: 2025 Feb 13 2322 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Feb 13 2320 UTC
Valid To: 2025 Feb 14 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

19:57 UTC

Space Weather Message Code: WARK04
Serial Number: 4831
Issue Time: 2025 Feb 13 1957 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4830
Valid From: 2025 Feb 13 0527 UTC
Now Valid Until: 2025 Feb 14 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

19:36 UTC

Space Weather Message Code: WATA20
Serial Number: 1028
Issue Time: 2025 Feb 13 1936 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

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

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:09 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3421
Issue Time: 2025 Feb 13 1409 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3420
Begin Time: 2025 Feb 11 1405 UTC
Yesterday Maximum 2MeV Flux: 2050 pfu



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

05:37 UTC

Space Weather Message Code: ALTK04
Serial Number: 2526
Issue Time: 2025 Feb 13 0537 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Feb 13 0534 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

05:27 UTC

Space Weather Message Code: WARK04
Serial Number: 4830
Issue Time: 2025 Feb 13 0527 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Feb 13 0527 UTC
Valid To: 2025 Feb 13 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

mercoledì, 12 febbraio AM

11:51 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3420
Issue Time: 2025 Feb 12 1151 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3419
Begin Time: 2025 Feb 11 1405 UTC
Yesterday Maximum 2MeV Flux: 2077 pfu



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

09:51 UTC

Space Weather Message Code: WARK04
Serial Number: 4829
Issue Time: 2025 Feb 12 0951 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4828
Valid From: 2025 Feb 09 1430 UTC
Now Valid Until: 2025 Feb 13 0300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

martedì, 11 febbraio PM

14:21 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3419
Issue Time: 2025 Feb 11 1421 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025 Feb 11 1405 UTC
Station: GOES16




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

11:34 UTC

Space Weather Message Code: WARK04
Serial Number: 4828
Issue Time: 2025 Feb 11 1134 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4827
Valid From: 2025 Feb 09 1430 UTC
Now Valid Until: 2025 Feb 12 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

lunedì, 10 febbraio PM

23:36 UTC

Space Weather Message Code: WARK04
Serial Number: 4827
Issue Time: 2025 Feb 10 2336 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4826
Valid From: 2025 Feb 09 1430 UTC
Now Valid Until: 2025 Feb 11 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

22:05 UTC

Space Weather Message Code: WATA20
Serial Number: 1027
Issue Time: 2025 Feb 10 2205 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 11: None (Below G1) Feb 12: None (Below G1) Feb 13: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

11:47 UTC

Space Weather Message Code: WARK04
Serial Number: 4826
Issue Time: 2025 Feb 10 1147 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4825
Valid From: 2025 Feb 09 1430 UTC
Now Valid Until: 2025 Feb 10 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

domenica, 9 febbraio PM

20:41 UTC

Space Weather Message Code: ALTK05
Serial Number: 1693
Issue Time: 2025 Feb 09 2041 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Feb 09 2041 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

20:35 UTC

Space Weather Message Code: WARK05
Serial Number: 1970
Issue Time: 2025 Feb 09 2035 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Feb 09 2030 UTC
Valid To: 2025 Feb 10 0600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:04 UTC

Space Weather Message Code: ALTK04
Serial Number: 2525
Issue Time: 2025 Feb 09 1704 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Feb 09 1701 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

14:30 UTC

Space Weather Message Code: WARK04
Serial Number: 4825
Issue Time: 2025 Feb 09 1430 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Feb 09 1430 UTC
Valid To: 2025 Feb 10 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

sabato, 8 febbraio PM

14:52 UTC

Space Weather Message Code: WARK04
Serial Number: 4824
Issue Time: 2025 Feb 08 1452 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4823
Valid From: 2025 Feb 08 0803 UTC
Now Valid Until: 2025 Feb 08 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

09:02 UTC

Space Weather Message Code: ALTK04
Serial Number: 2524
Issue Time: 2025 Feb 08 0902 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Feb 08 0859 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

08:04 UTC

Space Weather Message Code: WARK04
Serial Number: 4823
Issue Time: 2025 Feb 08 0804 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Feb 08 0803 UTC
Valid To: 2025 Feb 08 1500 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

venerdì, 7 febbraio PM

17:51 UTC

Space Weather Message Code: WATA20
Serial Number: 1026
Issue Time: 2025 Feb 07 1751 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 08: None (Below G1) Feb 09: None (Below G1) Feb 10: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Comment: A recurrent, negative polarity CH HSS will likely cause G1 (Minor) geomagnetic storm effects on 10 Feb.

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

09:44 UTC

Space Weather Message Code: SUMXM5
Serial Number: 286
Issue Time: 2025 Feb 07 0944 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2025 Feb 07 0859 UTC
Maximum Time: 2025 Feb 07 0921 UTC
End Time: 2025 Feb 07 0936 UTC
X-ray Class: M7.5
Location: N11W39
NOAA Scale: R2 - Moderate

Comment: 20% chance of an associated proton event later on the UTC day

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

09:16 UTC

Space Weather Message Code: ALTXMF
Serial Number: 475
Issue Time: 2025 Feb 07 0916 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Feb 07 0914 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

giovedì, 6 febbraio PM

12:49 UTC

Space Weather Message Code: SUMXM5
Serial Number: 285
Issue Time: 2025 Feb 06 1249 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2025 Feb 06 1047 UTC
Maximum Time: 2025 Feb 06 1104 UTC
End Time: 2025 Feb 06 1116 UTC
X-ray Class: M7.6
Location: N07W17
NOAA Scale: R2 - Moderate

Comment: Tenflare at 06/1058 with peak 8100 sfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

11:11 UTC

Space Weather Message Code: SUM10R
Serial Number: 859
Issue Time: 2025 Feb 06 1111 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2025 Feb 06 1058 UTC
Maximum Time: 2025 Feb 06 1058 UTC
End Time: 2025 Feb 06 1058 UTC
Duration: 1 minutes
Peak Flux: 8100 sfu
Latest Penticton Noon Flux: 191 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.

11:01 UTC

Space Weather Message Code: ALTXMF
Serial Number: 474
Issue Time: 2025 Feb 06 1101 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Feb 06 1113 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

mercoledì, 5 febbraio AM

08:53 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1399
Issue Time: 2025 Feb 05 0853 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Feb 05 0751 UTC
Estimated Velocity: 390 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.

martedì, 4 febbraio AM

11:23 UTC

Space Weather Message Code: ALTXMF
Serial Number: 473
Issue Time: 2025 Feb 04 1123 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Feb 04 1121 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

lunedì, 3 febbraio PM

13:27 UTC

Space Weather Message Code: SUMXM5
Serial Number: 284
Issue Time: 2025 Feb 03 1327 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2025 Feb 03 1307 UTC
Maximum Time: 2025 Feb 03 1318 UTC
End Time: 2025 Feb 03 1323 UTC
X-ray Class: M6.1
Optical Class: 2b
Location: N04E15
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

13:18 UTC

Space Weather Message Code: ALTXMF
Serial Number: 472
Issue Time: 2025 Feb 03 1318 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Feb 03 1315 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

06:38 UTC

Space Weather Message Code: SUM10R
Serial Number: 858
Issue Time: 2025 Feb 03 0638 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2025 Feb 03 0550 UTC
Maximum Time: 2025 Feb 03 0550 UTC
End Time: 2025 Feb 03 0550 UTC
Duration: 1 minutes
Peak Flux: 220 sfu
Latest Penticton Noon Flux: 216 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.

04:12 UTC

Space Weather Message Code: SUMXM5
Serial Number: 283
Issue Time: 2025 Feb 03 0412 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2025 Feb 03 0352 UTC
Maximum Time: 2025 Feb 03 0358 UTC
End Time: 2025 Feb 03 0404 UTC
X-ray Class: M8.8
Location: N05E24
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

03:57 UTC

Space Weather Message Code: ALTXMF
Serial Number: 471
Issue Time: 2025 Feb 03 0357 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Feb 03 0358 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

domenica, 2 febbraio PM

15:51 UTC

Space Weather Message Code: WARK05
Serial Number: 1969
Issue Time: 2025 Feb 02 1551 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Feb 02 1550 UTC
Valid To: 2025 Feb 02 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

15:46 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3418
Issue Time: 2025 Feb 02 1546 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025 Feb 02 1530 UTC
Station: GOES16




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

14:15 UTC

Space Weather Message Code: SUMXM5
Serial Number: 282
Issue Time: 2025 Feb 02 1415 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2025 Feb 02 1358 UTC
Maximum Time: 2025 Feb 02 1404 UTC
End Time: 2025 Feb 02 1408 UTC
X-ray Class: M5.1
Location: N18E03
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

14:05 UTC

Space Weather Message Code: ALTXMF
Serial Number: 470
Issue Time: 2025 Feb 02 1405 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Feb 02 1404 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

10:40 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1398
Issue Time: 2025 Feb 02 1040 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Feb 02 1018 UTC
Estimated Velocity: 664 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.

06:22 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1397
Issue Time: 2025 Feb 02 0622 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Feb 02 0540 UTC
Estimated Velocity: 736 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.

05:15 UTC

Space Weather Message Code: WARK04
Serial Number: 4822
Issue Time: 2025 Feb 02 0515 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4821
Valid From: 2025 Feb 01 0023 UTC
Now Valid Until: 2025 Feb 02 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

sabato, 1 febbraio PM

14:59 UTC

Space Weather Message Code: WARK04
Serial Number: 4821
Issue Time: 2025 Feb 01 1459 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4820
Valid From: 2025 Feb 01 0023 UTC
Now Valid Until: 2025 Feb 02 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

14:59 UTC

Space Weather Message Code: WARK05
Serial Number: 1968
Issue Time: 2025 Feb 01 1459 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Feb 01 1457 UTC
Valid To: 2025 Feb 01 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

13:52 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1396
Issue Time: 2025 Feb 01 1352 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Feb 01 1328 UTC
Estimated Velocity: 264 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.

02:40 UTC

Space Weather Message Code: ALTK04
Serial Number: 2523
Issue Time: 2025 Feb 01 0240 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Feb 01 0230 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

00:24 UTC

Space Weather Message Code: WARK04
Serial Number: 4820
Issue Time: 2025 Feb 01 0024 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Feb 01 0023 UTC
Valid To: 2025 Feb 01 1800 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

venerdì, 31 gennaio PM

14:30 UTC

Space Weather Message Code: SUMXM5
Serial Number: 281
Issue Time: 2025 Jan 31 1430 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2025 Jan 31 1340 UTC
Maximum Time: 2025 Jan 31 1406 UTC
End Time: 2025 Jan 31 1425 UTC
X-ray Class: M6.7
Location: N14E41
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

14:20 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1395
Issue Time: 2025 Jan 31 1420 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Jan 31 1356 UTC
Estimated Velocity: 673 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.

14:18 UTC

Space Weather Message Code: SUM10R
Serial Number: 857
Issue Time: 2025 Jan 31 1418 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2025 Jan 31 1348 UTC
Maximum Time: 2025 Jan 31 1352 UTC
End Time: 2025 Jan 31 1402 UTC
Duration: 14 minutes
Peak Flux: 280 sfu
Latest Penticton Noon Flux: 184 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.

13:58 UTC

Space Weather Message Code: ALTXMF
Serial Number: 469
Issue Time: 2025 Jan 31 1358 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Jan 31 1358 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

giovedì, 30 gennaio PM

17:06 UTC

Space Weather Message Code: WATA20
Serial Number: 1025
Issue Time: 2025 Jan 30 1706 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Jan 31: G1 (Minor) Feb 01: G1 (Minor) Feb 02: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

mercoledì, 29 gennaio PM

18:54 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1394
Issue Time: 2025 Jan 29 1854 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Jan 29 1821 UTC
Estimated Velocity: 487 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.

martedì, 28 gennaio PM

20:57 UTC

Space Weather Message Code: ALTK04
Serial Number: 2522
Issue Time: 2025 Jan 28 2057 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Jan 28 2021 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

20:51 UTC

Space Weather Message Code: WARK04
Serial Number: 4819
Issue Time: 2025 Jan 28 2051 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Jan 28 2021 UTC
Valid To: 2025 Jan 29 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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

08:47 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1393
Issue Time: 2025 Jan 28 0847 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Jan 28 0806 UTC
Estimated Velocity: 580 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.

lunedì, 27 gennaio PM

14:30 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3417
Issue Time: 2025 Jan 27 1430 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025 Jan 27 1415 UTC
Station: GOES-16




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

venerdì, 24 gennaio PM

17:04 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1392
Issue Time: 2025 Jan 24 1704 UTC

ALERT: Type II Radio Emission
Begin Time: 2025 Jan 24 1622 UTC
Estimated Velocity: 273 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.

giovedì, 23 gennaio PM

17:42 UTC

Space Weather Message Code: WARK04
Serial Number: 4818
Issue Time: 2025 Jan 23 1742 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Jan 23 1742 UTC
Valid To: 2025 Jan 23 2100 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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