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.
mercoledì, 2 aprile AM
11:02 UTC
Space Weather Message Code: WARPX1
Serial Number: 600
Issue Time: 2025 Apr 02 1102 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 599
Valid From: 2025 Mar 31 1057 UTC
Now Valid Until: 2025 Apr 02 1800 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.
08:51 UTC
Space Weather Message Code: WARK05
Serial Number: 2006
Issue Time: 2025 Apr 02 0851 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2005
Valid From: 2025 Apr 02 0233 UTC
Now Valid Until: 2025 Apr 02 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 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.
08:51 UTC
Space Weather Message Code: WARK04
Serial Number: 4897
Issue Time: 2025 Apr 02 0851 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4896
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 02 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.
02:34 UTC
Space Weather Message Code: WARK04
Serial Number: 4896
Issue Time: 2025 Apr 02 0234 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4895
Valid From: 2025 Apr 02 0123 UTC
Now Valid Until: 2025 Apr 02 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.
02:34 UTC
Space Weather Message Code: WARK05
Serial Number: 2005
Issue Time: 2025 Apr 02 0234 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Apr 02 0233 UTC
Valid To: 2025 Apr 02 0900 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.
01:33 UTC
Space Weather Message Code: ALTK04
Serial Number: 2540
Issue Time: 2025 Apr 02 0133 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Apr 02 0132 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.
01:23 UTC
Space Weather Message Code: WARK04
Serial Number: 4895
Issue Time: 2025 Apr 02 0123 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Apr 02 0123 UTC
Valid To: 2025 Apr 02 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.
00:23 UTC
Space Weather Message Code: WATA20
Serial Number: 1034
Issue Time: 2025 Apr 02 0023 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Apr 02: None (Below G1) Apr 03: None (Below G1) Apr 04: 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.
martedì, 1 aprile PM
23:37 UTC
Space Weather Message Code: WARPX1
Serial Number: 599
Issue Time: 2025 Apr 01 2337 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 598
Valid From: 2025 Mar 31 1057 UTC
Now Valid Until: 2025 Apr 02 1200 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.
18:15 UTC
Space Weather Message Code: SUMPX2
Serial Number: 56
Issue Time: 2025 Apr 01 1815 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2025 Apr 01 0205 UTC
Maximum Time: 2025 Apr 01 0425 UTC
End Time: 2025 Apr 01 0910 UTC
Maximum 10MeV Flux: 147 pfu
NOAA Scale: S2 - Moderate
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
10:12 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3443
Issue Time: 2025 Apr 01 1012 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3442
Begin Time: 2025 Mar 28 1410 UTC
Yesterday Maximum 2MeV Flux: 2039 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
07:14 UTC
Space Weather Message Code: SUM10R
Serial Number: 863
Issue Time: 2025 Apr 01 0714 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2025 Apr 01 0645 UTC
Maximum Time: 2025 Apr 01 0645 UTC
End Time: 2025 Apr 01 0645 UTC
Duration: 1 minutes
Peak Flux: 190 sfu
Latest Penticton Noon Flux: 172 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.
07:05 UTC
Space Weather Message Code: SUMXM5
Serial Number: 287
Issue Time: 2025 Apr 01 0704 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2025 Apr 01 0637 UTC
Maximum Time: 2025 Apr 01 0646 UTC
End Time: 2025 Apr 01 0653 UTC
X-ray Class: M5.6
Optical Class: na
Location: N10E25
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.
06:51 UTC
Space Weather Message Code: ALTXMF
Serial Number: 478
Issue Time: 2025 Apr 01 0651 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Apr 01 0645 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.
02:22 UTC
Space Weather Message Code: ALTPX2
Serial Number: 77
Issue Time: 2025 Apr 01 0222 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2025 Apr 01 0205 UTC
NOAA Scale: S2 - Moderate
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience small, increased radiation exposures.
Spacecraft - Infrequent single-event upsets to satellites are possible.
Radio - Small effects on polar HF (high frequency) propagation resulting in fades at lower frequencies.
lunedì, 31 marzo PM
23:54 UTC
Space Weather Message Code: WARPX1
Serial Number: 598
Issue Time: 2025 Mar 31 2354 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 597
Valid From: 2025 Mar 31 1057 UTC
Now Valid Until: 2025 Apr 01 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.
11:21 UTC
Space Weather Message Code: ALTPX1
Serial Number: 357
Issue Time: 2025 Mar 31 1121 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025 Mar 31 1105 UTC
NOAA Scale: S1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.
10:58 UTC
Space Weather Message Code: WARPX1
Serial Number: 597
Issue Time: 2025 Mar 31 1058 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025 Mar 31 1057 UTC
Valid To: 2025 Mar 31 2359 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.
05:02 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3442
Issue Time: 2025 Mar 31 0502 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3441
Begin Time: 2025 Mar 28 1410 UTC
Yesterday Maximum 2MeV Flux: 2772 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
domenica, 30 marzo AM
05:01 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3441
Issue Time: 2025 Mar 30 0501 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3440
Begin Time: 2025 Mar 28 1410 UTC
Yesterday Maximum 2MeV Flux: 2968 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
sabato, 29 marzo AM
05:07 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3440
Issue Time: 2025 Mar 29 0507 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3439
Begin Time: 2025 Mar 28 1410 UTC
Yesterday Maximum 2MeV Flux: 2819 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
venerdì, 28 marzo PM
23:57 UTC
Space Weather Message Code: WARK04
Serial Number: 4894
Issue Time: 2025 Mar 28 2357 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4893
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 29 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.
16:09 UTC
Space Weather Message Code: SUMX01
Serial Number: 191
Issue Time: 2025 Mar 28 1609 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2025 Mar 28 1503 UTC
Maximum Time: 2025 Mar 28 1521 UTC
End Time: 2025 Mar 28 1542 UTC
X-ray Class: X1.1
Location: N06E75
NOAA Scale: R3 - Strong
Comment: This summary is resent to correct the X-ray Class of this event to an X1.1 vs an X1.4.
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
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.
15:50 UTC
Space Weather Message Code: SUMX01
Serial Number: 190
Issue Time: 2025 Mar 28 1550 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2025 Mar 28 1503 UTC
Maximum Time: 2025 Mar 28 1521 UTC
End Time: 2025 Mar 28 1542 UTC
X-ray Class: X1.4
Location: N06E75
NOAA Scale: R3 - Strong
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
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.
15:42 UTC
Space Weather Message Code: SUM10R
Serial Number: 862
Issue Time: 2025 Mar 28 1542 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2025 Feb 28 1506 UTC
Maximum Time: 2025 Feb 28 1514 UTC
End Time: 2025 Feb 28 1530 UTC
Duration: 24 minutes
Peak Flux: 380 sfu
Latest Penticton Noon Flux: 153 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.
15:37 UTC
Space Weather Message Code: ALTTP4
Serial Number: 679
Issue Time: 2025 Mar 28 1537 UTC
ALERT: Type IV Radio Emission
Begin Time: 2025 Mar 28 1514 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.
15:18 UTC
Space Weather Message Code: ALTXMF
Serial Number: 477
Issue Time: 2025 Mar 28 1518 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Mar 28 1507 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.
14:28 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3439
Issue Time: 2025 Mar 28 1428 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025 Mar 28 1410 UTC
Station: GOES16
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
08:23 UTC
Space Weather Message Code: WARK04
Serial Number: 4893
Issue Time: 2025 Mar 28 0823 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4892
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 28 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.
giovedì, 27 marzo PM
16:53 UTC
Space Weather Message Code: WARK04
Serial Number: 4892
Issue Time: 2025 Mar 27 1653 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4891
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 28 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.
16:47 UTC
Space Weather Message Code: WARK05
Serial Number: 2004
Issue Time: 2025 Mar 27 1647 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2003
Valid From: 2025 Mar 26 0131 UTC
Now Valid Until: 2025 Mar 28 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 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.
16:08 UTC
Space Weather Message Code: ALTK05
Serial Number: 1733
Issue Time: 2025 Mar 27 1608 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 27 1605 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.
15:03 UTC
Space Weather Message Code: ALTK05
Serial Number: 1732
Issue Time: 2025 Mar 27 1503 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 27 1459 UTC
Synoptic Period: 1200-1500 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.
09:02 UTC
Space Weather Message Code: ALTK05
Serial Number: 1731
Issue Time: 2025 Mar 27 0902 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 27 0859 UTC
Synoptic Period: 0600-0900 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.
05:57 UTC
Space Weather Message Code: ALTK05
Serial Number: 1730
Issue Time: 2025 Mar 27 0557 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 27 0551 UTC
Synoptic Period: 0300-0600 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.
04:52 UTC
Space Weather Message Code: WARK05
Serial Number: 2003
Issue Time: 2025 Mar 27 0452 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2002
Valid From: 2025 Mar 26 0131 UTC
Now Valid Until: 2025 Mar 27 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 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.
03:50 UTC
Space Weather Message Code: WARK04
Serial Number: 4891
Issue Time: 2025 Mar 27 0350 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4890
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 27 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.
mercoledì, 26 marzo PM
22:46 UTC
Space Weather Message Code: ALTK05
Serial Number: 1729
Issue Time: 2025 Mar 26 2246 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 26 2237 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.
20:18 UTC
Space Weather Message Code: WARK06
Serial Number: 569
Issue Time: 2025 Mar 26 2018 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 568
Valid From: 2025 Mar 26 1338 UTC
Now Valid Until: 2025 Mar 27 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 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.
20:16 UTC
Space Weather Message Code: ALTK06
Serial Number: 622
Issue Time: 2025 Mar 26 2016 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 26 2008 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
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.
20:04 UTC
Space Weather Message Code: ALTK05
Serial Number: 1728
Issue Time: 2025 Mar 26 2004 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 26 2000 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.
17:48 UTC
Space Weather Message Code: ALTK06
Serial Number: 621
Issue Time: 2025 Mar 26 1748 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 26 1700 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
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.
17:01 UTC
Space Weather Message Code: WARK05
Serial Number: 2002
Issue Time: 2025 Mar 26 1701 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2001
Valid From: 2025 Mar 26 0131 UTC
Now Valid Until: 2025 Mar 27 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 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.
16:59 UTC
Space Weather Message Code: WARK04
Serial Number: 4890
Issue Time: 2025 Mar 26 1659 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4889
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 27 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.
16:58 UTC
Space Weather Message Code: ALTK05
Serial Number: 1727
Issue Time: 2025 Mar 26 1658 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 26 1628 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.
14:04 UTC
Space Weather Message Code: ALTK06
Serial Number: 620
Issue Time: 2025 Mar 26 1404 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 26 1358 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
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.
13:38 UTC
Space Weather Message Code: WARK06
Serial Number: 568
Issue Time: 2025 Mar 26 1338 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Mar 26 1338 UTC
Valid To: 2025 Mar 26 2100 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.
11:17 UTC
Space Weather Message Code: WARK04
Serial Number: 4889
Issue Time: 2025 Mar 26 1117 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4888
Valid From: 2025 Mar 25 2017 UTC
Now Valid Until: 2025 Mar 26 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.
11:17 UTC
Space Weather Message Code: WARK05
Serial Number: 2001
Issue Time: 2025 Mar 26 1117 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2000
Valid From: 2025 Mar 26 0131 UTC
Now Valid Until: 2025 Mar 26 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 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.
11:12 UTC
Space Weather Message Code: ALTTP2
Serial Number: 1409
Issue Time: 2025 Mar 26 1112 UTC
ALERT: Type II Radio Emission
Begin Time: 2025 Mar 26 0920 UTC
Estimated Velocity: 571 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.
03:01 UTC
Space Weather Message Code: ALTK05
Serial Number: 1726
Issue Time: 2025 Mar 26 0301 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 26 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.
01:32 UTC
Space Weather Message Code: WARK05
Serial Number: 2000
Issue Time: 2025 Mar 26 0132 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 26 0131 UTC
Valid To: 2025 Mar 26 1200 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.
martedì, 25 marzo PM
21:12 UTC
Space Weather Message Code: WATA30
Serial Number: 248
Issue Time: 2025 Mar 25 2112 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Mar 26: G2 (Moderate) Mar 27: G1 (Minor) Mar 28: 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 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.
20:32 UTC
Space Weather Message Code: ALTK04
Serial Number: 2539
Issue Time: 2025 Mar 25 2032 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 25 2019 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.
20:18 UTC
Space Weather Message Code: WARK04
Serial Number: 4888
Issue Time: 2025 Mar 25 2018 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 25 2017 UTC
Valid To: 2025 Mar 26 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.
12:50 UTC
Space Weather Message Code: ALTTP2
Serial Number: 1408
Issue Time: 2025 Mar 25 1250 UTC
ALERT: Type II Radio Emission
Begin Time: 2025 Mar 25 1236 UTC
Estimated Velocity: 516 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.
03:20 UTC
Space Weather Message Code: WARK04
Serial Number: 4887
Issue Time: 2025 Mar 25 0320 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 25 0330 UTC
Valid To: 2025 Mar 25 1530 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.
lunedì, 24 marzo AM
11:07 UTC
Space Weather Message Code: WATA30
Serial Number: 247
Issue Time: 2025 Mar 24 1107 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Mar 24: G1 (Minor) Mar 25: G2 (Moderate) Mar 26: 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 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.
04:11 UTC
Space Weather Message Code: WARK05
Serial Number: 1999
Issue Time: 2025 Mar 24 0411 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 24 0410 UTC
Valid To: 2025 Mar 24 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.
02:35 UTC
Space Weather Message Code: ALTK04
Serial Number: 2538
Issue Time: 2025 Mar 24 0235 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 24 0233 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.
01:29 UTC
Space Weather Message Code: WARK04
Serial Number: 4886
Issue Time: 2025 Mar 24 0129 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 24 0129 UTC
Valid To: 2025 Mar 24 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.
00:57 UTC
Space Weather Message Code: SUMSUD
Serial Number: 285
Issue Time: 2025 Mar 24 0057 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2025 Mar 24 0038 UTC
Deviation: 15 nT
Station: NGK
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
00:28 UTC
Space Weather Message Code: WARSUD
Serial Number: 241
Issue Time: 2025 Mar 24 0028 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2025 Mar 24 0030 UTC
Valid To: 2025 Mar 24 0130 UTC
IP Shock Passage Observed: 2025 Mar 24 0017 UTC
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
sabato, 22 marzo PM
23:37 UTC
Space Weather Message Code: ALTK05
Serial Number: 1725
Issue Time: 2025 Mar 22 2337 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 22 2337 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.
23:05 UTC
Space Weather Message Code: WARK05
Serial Number: 1998
Issue Time: 2025 Mar 22 2305 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1997
Valid From: 2025 Mar 22 1648 UTC
Now Valid Until: 2025 Mar 23 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.
23:05 UTC
Space Weather Message Code: WARK04
Serial Number: 4885
Issue Time: 2025 Mar 22 2305 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4884
Valid From: 2025 Mar 21 1715 UTC
Now Valid Until: 2025 Mar 23 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.
16:49 UTC
Space Weather Message Code: WARK04
Serial Number: 4884
Issue Time: 2025 Mar 22 1649 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4883
Valid From: 2025 Mar 21 1715 UTC
Now Valid Until: 2025 Mar 22 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.
16:48 UTC
Space Weather Message Code: WARK05
Serial Number: 1997
Issue Time: 2025 Mar 22 1648 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 22 1648 UTC
Valid To: 2025 Mar 22 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.
11:21 UTC
Space Weather Message Code: WARK04
Serial Number: 4883
Issue Time: 2025 Mar 22 1121 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4882
Valid From: 2025 Mar 21 1715 UTC
Now Valid Until: 2025 Mar 22 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.
06:03 UTC
Space Weather Message Code: WARK04
Serial Number: 4882
Issue Time: 2025 Mar 22 0603 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4881
Valid From: 2025 Mar 21 1715 UTC
Now Valid Until: 2025 Mar 22 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.
03:37 UTC
Space Weather Message Code: ALTK05
Serial Number: 1724
Issue Time: 2025 Mar 22 0337 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 22 0335 UTC
Synoptic Period: 0300-0600 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.
03:13 UTC
Space Weather Message Code: WATA50
Serial Number: 85
Issue Time: 2025 Mar 22 0313 UTC
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day:
Mar 23: G3 (Strong) Mar 24: G1 (Minor) Mar 25: G2 (Moderate)
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 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
03:02 UTC
Space Weather Message Code: ALTK06
Serial Number: 619
Issue Time: 2025 Mar 22 0302 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 22 0259 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
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.
01:40 UTC
Space Weather Message Code: ALTK05
Serial Number: 1723
Issue Time: 2025 Mar 22 0139 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 22 0136 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.
venerdì, 21 marzo PM
23:35 UTC
Space Weather Message Code: ALTK05
Serial Number: 1722
Issue Time: 2025 Mar 21 2335 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 21 2330 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.
19:43 UTC
Space Weather Message Code: WARK06
Serial Number: 567
Issue Time: 2025 Mar 21 1943 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Mar 21 1945 UTC
Valid To: 2025 Mar 22 0600 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.
18:55 UTC
Space Weather Message Code: ALTK05
Serial Number: 1721
Issue Time: 2025 Mar 21 1855 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 21 1855 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: 1996
Issue Time: 2025 Mar 21 1733 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 21 1732 UTC
Valid To: 2025 Mar 22 0900 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.
17:31 UTC
Space Weather Message Code: ALTK04
Serial Number: 2537
Issue Time: 2025 Mar 21 1731 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 21 1730 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.
17:12 UTC
Space Weather Message Code: WARK04
Serial Number: 4881
Issue Time: 2025 Mar 21 1712 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 21 1715 UTC
Valid To: 2025 Mar 22 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.
16:12 UTC
Space Weather Message Code: ALTTP2
Serial Number: 1407
Issue Time: 2025 Mar 21 1612 UTC
ALERT: Type II Radio Emission
Begin Time: 2025 Mar 21 1557 UTC
Estimated Velocity: 242 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 marzo PM
21:03 UTC
Space Weather Message Code: ALTK05
Serial Number: 1720
Issue Time: 2025 Mar 19 2103 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 19 2059 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.
20:52 UTC
Space Weather Message Code: WARK04
Serial Number: 4880
Issue Time: 2025 Mar 19 2052 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4879
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 20 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.
20:39 UTC
Space Weather Message Code: WARK05
Serial Number: 1995
Issue Time: 2025 Mar 19 2039 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 19 2039 UTC
Valid To: 2025 Mar 20 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.
07:50 UTC
Space Weather Message Code: WARK05
Serial Number: 1994
Issue Time: 2025 Mar 19 0750 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 19 0749 UTC
Valid To: 2025 Mar 19 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.
05:15 UTC
Space Weather Message Code: WARK04
Serial Number: 4879
Issue Time: 2025 Mar 19 0515 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4878
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 19 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.
martedì, 18 marzo PM
23:52 UTC
Space Weather Message Code: WARK04
Serial Number: 4878
Issue Time: 2025 Mar 18 2352 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4877
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 19 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.
07:34 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3438
Issue Time: 2025 Mar 18 0734 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3437
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 6680 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
05:56 UTC
Space Weather Message Code: WARK04
Serial Number: 4877
Issue Time: 2025 Mar 18 0556 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4876
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 18 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.
lunedì, 17 marzo PM
21:02 UTC
Space Weather Message Code: ALTK04
Serial Number: 2536
Issue Time: 2025 Mar 17 2102 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 17 2059 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.
20:54 UTC
Space Weather Message Code: WARK04
Serial Number: 4876
Issue Time: 2025 Mar 17 2054 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4875
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 18 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.
14:48 UTC
Space Weather Message Code: WARK04
Serial Number: 4875
Issue Time: 2025 Mar 17 1448 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4874
Valid From: 2025 Mar 17 0345 UTC
Now Valid Until: 2025 Mar 17 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.
05:21 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3437
Issue Time: 2025 Mar 17 0521 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3436
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 5055 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
03:48 UTC
Space Weather Message Code: WARK04
Serial Number: 4874
Issue Time: 2025 Mar 17 0348 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 17 0345 UTC
Valid To: 2025 Mar 17 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.
domenica, 16 marzo PM
14:48 UTC
Space Weather Message Code: WARK04
Serial Number: 4873
Issue Time: 2025 Mar 16 1448 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 16 1447 UTC
Valid To: 2025 Mar 17 0300 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.
07:37 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3436
Issue Time: 2025 Mar 16 0737 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3435
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 4951 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
sabato, 15 marzo AM
05:00 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3435
Issue Time: 2025 Mar 15 0500 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3434
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 3982 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
01:55 UTC
Space Weather Message Code: WARK04
Serial Number: 4872
Issue Time: 2025 Mar 15 0155 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4871
Valid From: 2025 Mar 12 0735 UTC
Now Valid Until: 2025 Mar 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 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.
01:42 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3434
Issue Time: 2025 Mar 15 0142 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3433
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 3982 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
venerdì, 14 marzo PM
17:34 UTC
Space Weather Message Code: WARK04
Serial Number: 4871
Issue Time: 2025 Mar 14 1734 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4870
Valid From: 2025 Mar 12 0735 UTC
Now Valid Until: 2025 Mar 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.
10:45 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3433
Issue Time: 2025 Mar 14 1045 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3432
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 1561 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
01:41 UTC
Space Weather Message Code: ALTK06
Serial Number: 618
Issue Time: 2025 Mar 14 0141 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 14 0142 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
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.
01:40 UTC
Space Weather Message Code: WARK06
Serial Number: 566
Issue Time: 2025 Mar 14 0140 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Mar 14 0140 UTC
Valid To: 2025 Mar 14 1200 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.
01:30 UTC
Space Weather Message Code: WARK05
Serial Number: 1993
Issue Time: 2025 Mar 14 0130 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1992
Valid From: 2025 Mar 13 1930 UTC
Now Valid Until: 2025 Mar 14 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 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.
01:29 UTC
Space Weather Message Code: WARK04
Serial Number: 4870
Issue Time: 2025 Mar 14 0129 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4869
Valid From: 2025 Mar 12 0735 UTC
Now Valid Until: 2025 Mar 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.
01:27 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3432
Issue Time: 2025 Mar 14 0127 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3431
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 1561 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
01:25 UTC
Space Weather Message Code: ALTK05
Serial Number: 1719
Issue Time: 2025 Mar 14 0125 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 14 0120 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 marzo PM
19:50 UTC
Space Weather Message Code: ALTK05
Serial Number: 1718
Issue Time: 2025 Mar 13 1950 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 13 1944 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.
19:34 UTC
Space Weather Message Code: WARK05
Serial Number: 1992
Issue Time: 2025 Mar 13 1934 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 13 1930 UTC
Valid To: 2025 Mar 14 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.
19:00 UTC
Space Weather Message Code: WARK04
Serial Number: 4869
Issue Time: 2025 Mar 13 1900 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4868
Valid From: 2025 Mar 12 0735 UTC
Now Valid Until: 2025 Mar 14 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.
14:18 UTC
Space Weather Message Code: WARK04
Serial Number: 4868
Issue Time: 2025 Mar 13 1418 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4867
Valid From: 2025 Mar 12 0735 UTC
Now Valid Until: 2025 Mar 13 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.
14:18 UTC
Space Weather Message Code: WARK05
Serial Number: 1991
Issue Time: 2025 Mar 13 1418 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1990
Valid From: 2025 Mar 12 1050 UTC
Now Valid Until: 2025 Mar 13 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 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.
13:24 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3431
Issue Time: 2025 Mar 13 1324 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3430
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 1994 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
12:48 UTC
Space Weather Message Code: ALTK05
Serial Number: 1717
Issue Time: 2025 Mar 13 1248 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 13 1248 UTC
Synoptic Period: 1200-1500 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.
12:01 UTC
Space Weather Message Code: ALTK05
Serial Number: 1716
Issue Time: 2025 Mar 13 1201 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 13 1159 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.
08:40 UTC
Space Weather Message Code: ALTK05
Serial Number: 1715
Issue Time: 2025 Mar 13 0840 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 13 0839 UTC
Synoptic Period: 0600-0900 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.
05:55 UTC
Space Weather Message Code: WARK05
Serial Number: 1990
Issue Time: 2025 Mar 13 0555 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1989
Valid From: 2025 Mar 12 1050 UTC
Now Valid Until: 2025 Mar 13 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 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.
05:55 UTC
Space Weather Message Code: WARK04
Serial Number: 4867
Issue Time: 2025 Mar 13 0555 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4866
Valid From: 2025 Mar 12 0735 UTC
Now Valid Until: 2025 Mar 13 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.
04:35 UTC
Space Weather Message Code: ALTK05
Serial Number: 1714
Issue Time: 2025 Mar 13 0435 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 13 0435 UTC
Synoptic Period: 0300-0600 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.
01:32 UTC
Space Weather Message Code: ALTK05
Serial Number: 1713
Issue Time: 2025 Mar 13 0132 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 13 0131 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.
mercoledì, 12 marzo PM
23:53 UTC
Space Weather Message Code: ALTK05
Serial Number: 1712
Issue Time: 2025 Mar 12 2353 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 12 2353 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.
23:02 UTC
Space Weather Message Code: WARK05
Serial Number: 1989
Issue Time: 2025 Mar 12 2302 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1988
Valid From: 2025 Mar 12 1050 UTC
Now Valid Until: 2025 Mar 13 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 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.
20:55 UTC
Space Weather Message Code: ALTK05
Serial Number: 1711
Issue Time: 2025 Mar 12 2055 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 12 2051 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.
17:52 UTC
Space Weather Message Code: WARK04
Serial Number: 4866
Issue Time: 2025 Mar 12 1752 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4865
Valid From: 2025 Mar 12 0735 UTC
Now Valid Until: 2025 Mar 13 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.
17:51 UTC
Space Weather Message Code: WARK05
Serial Number: 1988
Issue Time: 2025 Mar 12 1751 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1987
Valid From: 2025 Mar 12 1050 UTC
Now Valid Until: 2025 Mar 13 0000 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.
17:49 UTC
Space Weather Message Code: ALTK05
Serial Number: 1710
Issue Time: 2025 Mar 12 1749 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 12 1742 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.
11:16 UTC
Space Weather Message Code: ALTK04
Serial Number: 2535
Issue Time: 2025 Mar 12 1116 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 12 1030 UTC
Synoptic Period: 0900-1200 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.
10:50 UTC
Space Weather Message Code: WARK05
Serial Number: 1987
Issue Time: 2025 Mar 12 1050 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 12 1050 UTC
Valid To: 2025 Mar 12 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.
07:47 UTC
Space Weather Message Code: ALTTP2
Serial Number: 1406
Issue Time: 2025 Mar 12 0747 UTC
ALERT: Type II Radio Emission
Begin Time: 2025 Mar 12 0503 UTC
Estimated Velocity: 403 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.
07:35 UTC
Space Weather Message Code: WARK04
Serial Number: 4865
Issue Time: 2025 Mar 12 0735 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 12 0735 UTC
Valid To: 2025 Mar 12 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.
07:01 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3430
Issue Time: 2025 Mar 12 0701 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3429
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 4110 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
02:37 UTC
Space Weather Message Code: ALTK04
Serial Number: 2534
Issue Time: 2025 Mar 12 0237 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 12 0236 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.
00:07 UTC
Space Weather Message Code: WARK04
Serial Number: 4864
Issue Time: 2025 Mar 12 0007 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 12 0006 UTC
Valid To: 2025 Mar 12 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.
martedì, 11 marzo AM
09:22 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3429
Issue Time: 2025 Mar 11 0922 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3428
Begin Time: 2025 Mar 10 1150 UTC
Yesterday Maximum 2MeV Flux: 2397 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
lunedì, 10 marzo PM
12:07 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3428
Issue Time: 2025 Mar 10 1207 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2025 Mar 10 1150 UTC
Station: GOES16
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
domenica, 9 marzo PM
23:20 UTC
Space Weather Message Code: WARK06
Serial Number: 565
Issue Time: 2025 Mar 09 2320 UTC
CANCEL WARNING: Geomagnetic K-Index of 6 expected
Cancel Serial Number: 564
Original Issue Time: 2025 Mar 09 0423 UTC
Comment: The previous extention was an error. The conditions for this level of geomagnetic activity no longer exist.
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.
23:19 UTC
Space Weather Message Code: WARK04
Serial Number: 4863
Issue Time: 2025 Mar 09 2319 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4862
Valid From: 2025 Mar 08 1500 UTC
Now Valid Until: 2025 Mar 10 0600 UTC
Warning Condition: Persisence
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.
23:18 UTC
Space Weather Message Code: WARK06
Serial Number: 564
Issue Time: 2025 Mar 09 2318 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 563
Valid From: 2025 Mar 09 0422 UTC
Now Valid Until: 2025 Mar 10 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 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.
10:40 UTC
Space Weather Message Code: WARK06
Serial Number: 563
Issue Time: 2025 Mar 09 1040 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 562
Valid From: 2025 Mar 09 0422 UTC
Now Valid Until: 2025 Mar 09 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 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.
10:40 UTC
Space Weather Message Code: ALTK06
Serial Number: 617
Issue Time: 2025 Mar 09 1040 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 09 1040 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
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.
09:32 UTC
Space Weather Message Code: ALTK05
Serial Number: 1709
Issue Time: 2025 Mar 09 0932 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 09 0931 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.
05:59 UTC
Space Weather Message Code: ALTK06
Serial Number: 616
Issue Time: 2025 Mar 09 0559 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Mar 09 0559 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
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.
04:23 UTC
Space Weather Message Code: WARK06
Serial Number: 562
Issue Time: 2025 Mar 09 0423 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Mar 09 0422 UTC
Valid To: 2025 Mar 09 1200 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.
04:23 UTC
Space Weather Message Code: WARK05
Serial Number: 1986
Issue Time: 2025 Mar 09 0423 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1985
Valid From: 2025 Mar 08 2019 UTC
Now Valid Until: 2025 Mar 09 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 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.
04:23 UTC
Space Weather Message Code: WARK04
Serial Number: 4862
Issue Time: 2025 Mar 09 0423 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4861
Valid From: 2025 Mar 08 1500 UTC
Now Valid Until: 2025 Mar 09 2359 UTC
Warning Condition: Persisence
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.
04:06 UTC
Space Weather Message Code: ALTK05
Serial Number: 1708
Issue Time: 2025 Mar 09 0406 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 09 0405 UTC
Synoptic Period: 0300-0600 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.
02:57 UTC
Space Weather Message Code: ALTK05
Serial Number: 1707
Issue Time: 2025 Mar 09 0257 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 09 0255 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.
sabato, 8 marzo PM
23:15 UTC
Space Weather Message Code: ALTK05
Serial Number: 1706
Issue Time: 2025 Mar 08 2315 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 08 2310 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.
21:03 UTC
Space Weather Message Code: ALTK05
Serial Number: 1705
Issue Time: 2025 Mar 08 2103 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Mar 08 2059 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.
20:20 UTC
Space Weather Message Code: WARK05
Serial Number: 1985
Issue Time: 2025 Mar 08 2020 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 08 2019 UTC
Valid To: 2025 Mar 09 1200 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.
14:56 UTC
Space Weather Message Code: WARK04
Serial Number: 4861
Issue Time: 2025 Mar 08 1456 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 08 1500 UTC
Valid To: 2025 Mar 09 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.
09:01 UTC
Space Weather Message Code: ALTK04
Serial Number: 2533
Issue Time: 2025 Mar 08 0901 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 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.
06:58 UTC
Space Weather Message Code: WARK04
Serial Number: 4860
Issue Time: 2025 Mar 08 0658 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 08 0700 UTC
Valid To: 2025 Mar 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 marzo PM
19:12 UTC
Space Weather Message Code: WATA20
Serial Number: 1033
Issue Time: 2025 Mar 07 1912 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Mar 08: None (Below G1) Mar 09: G1 (Minor) Mar 10: 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.
02:56 UTC
Space Weather Message Code: WATA20
Serial Number: 1032
Issue Time: 2025 Mar 07 0256 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Mar 07: None (Below G1) Mar 08: None (Below G1) Mar 09: 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.
mercoledì, 5 marzo AM
11:54 UTC
Space Weather Message Code: WARK04
Serial Number: 4859
Issue Time: 2025 Mar 05 1154 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4858
Valid From: 2025 Mar 04 2132 UTC
Now Valid Until: 2025 Mar 05 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.
martedì, 4 marzo PM
21:39 UTC
Space Weather Message Code: WARK05
Serial Number: 1984
Issue Time: 2025 Mar 04 2139 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Mar 04 2139 UTC
Valid To: 2025 Mar 05 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.
21:36 UTC
Space Weather Message Code: ALTK04
Serial Number: 2532
Issue Time: 2025 Mar 04 2136 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025 Mar 04 2127 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.
21:33 UTC
Space Weather Message Code: WARK04
Serial Number: 4858
Issue Time: 2025 Mar 04 2133 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Mar 04 2132 UTC
Valid To: 2025 Mar 05 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.
18:44 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3427
Issue Time: 2025 Mar 04 1844 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3426
Begin Time: 2025 Mar 02 1510 UTC
Yesterday Maximum 2MeV Flux: 1134 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Ultime notizie
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Coronal hole faces Earth
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