Предупреждения NOAA SWPC

Национальный центр прогнозирования метеорологической погоды (NOAA SWPC) является официальным агентством по космической погоде США, которое оперативно осуществляет оповещения о ее изменениях. Ниже вы найдете последние сообщения о погоде в космосе, прогнозы, временные интервалы и предупреждения, от NOAA SWPC.

воскресенье, 26 апреля 2026

11:47 UTC

Space Weather Message Code: WARK04
Serial Number: 5329
Issue Time: 2026 Apr 26 1147 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5328
Valid From: 2026 Apr 26 0359 UTC
Now Valid Until: 2026 Apr 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.

06:01 UTC

Space Weather Message Code: WARK04
Serial Number: 5328
Issue Time: 2026 Apr 26 0601 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 26 0359 UTC
Valid To: 2026 Apr 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.

05:59 UTC

Space Weather Message Code: ALTK04
Serial Number: 2652
Issue Time: 2026 Apr 26 0559 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Apr 26 0559 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes

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

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

суббота, 25 апреля 2026

01:37 UTC

Space Weather Message Code: WARK04
Serial Number: 5327
Issue Time: 2026 Apr 25 0137 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 25 0137 UTC
Valid To: 2026 Apr 25 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.

пятница, 24 апреля 2026

23:50 UTC

Space Weather Message Code: WATA20
Serial Number: 1109
Issue Time: 2026 Apr 24 2350 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Apr 25: G1 (Minor) Apr 26: G1 (Minor) Apr 27: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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

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

18:35 UTC

Space Weather Message Code: SUMXM5
Serial Number: 313
Issue Time: 2026 Apr 24 1835 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Apr 24 1754 UTC
Maximum Time: 2026 Apr 24 1815 UTC
End Time: 2026 Apr 24 1830 UTC
X-ray Class: M6.4
Location: N19W90
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.

18:12 UTC

Space Weather Message Code: ALTXMF
Serial Number: 525
Issue Time: 2026 Apr 24 1812 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Apr 24 1812 UTC
NOAA Scale: R2 - Moderate

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

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

10:42 UTC

Space Weather Message Code: ALTTP4
Serial Number: 707
Issue Time: 2026 Apr 24 1041 UTC

ALERT: Type IV Radio Emission
Begin Time: 2026 Apr 24 0840 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.

09:28 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1479
Issue Time: 2026 Apr 24 0928 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 Apr 24 0815 UTC
Estimated Velocity: 1293 km/s

Comment: Reissued with adjusted shock speed.



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.

09:27 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1478
Issue Time: 2026 Apr 24 0927 UTC

CANCEL ALERT: Type II Radio Emission
Cancel Serial Number: 1477
Original Issue Time: 2026 Apr 24 0857 UTC

Comment: Reissuing with corrected shock speed.



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.

08:57 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1477
Issue Time: 2026 Apr 24 0857 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 Apr 24 0815 UTC
Estimated Velocity: 1869 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.

08:38 UTC

Space Weather Message Code: SUM10R
Serial Number: 908
Issue Time: 2026 Apr 24 0838 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 Apr 24 0809 UTC
Maximum Time: 2026 Apr 24 0811 UTC
End Time: 2026 Apr 24 0815 UTC
Duration: 6 minutes
Peak Flux: 570 sfu
Latest Penticton Noon Flux: 128 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

08:26 UTC

Space Weather Message Code: SUMX01
Serial Number: 216
Issue Time: 2026 Apr 24 0826 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Apr 24 0801 UTC
Maximum Time: 2026 Apr 24 0813 UTC
End Time: 2026 Apr 24 0818 UTC
X-ray Class: X2.5
Optical Class: 2b
Location: N20W90
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.

08:12 UTC

Space Weather Message Code: ALTXMF
Serial Number: 524
Issue Time: 2026 Apr 24 0812 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Apr 24 0812 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.

05:05 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3684
Issue Time: 2026 Apr 24 0505 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3683
Begin Time: 2026 Apr 19 1920 UTC
Yesterday Maximum 2MeV Flux: 3446 pfu



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

01:31 UTC

Space Weather Message Code: SUMX01
Serial Number: 215
Issue Time: 2026 Apr 24 0131 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Apr 24 0051 UTC
Maximum Time: 2026 Apr 24 0107 UTC
End Time: 2026 Apr 24 0113 UTC
X-ray Class: X2.4
Location: N17W71
NOAA Scale: R3 - Strong

Comment: Accompanied by a tenflare with a castelli-U signature. No radio observations currently available.

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.

01:29 UTC

Space Weather Message Code: SUM10R
Serial Number: 907
Issue Time: 2026 Apr 24 0129 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 Apr 24 0103 UTC
Maximum Time: 2026 Apr 24 0104 UTC
End Time: 2026 Apr 24 0109 UTC
Duration: 6 minutes
Peak Flux: 570 sfu
Latest Penticton Noon Flux: 128 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.

01:08 UTC

Space Weather Message Code: ALTXMF
Serial Number: 523
Issue Time: 2026 Apr 24 0108 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Apr 24 0105 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.

четверг, 23 апреля 2026

17:23 UTC

Space Weather Message Code: SUM10R
Serial Number: 906
Issue Time: 2026 Apr 23 1723 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 Apr 23 1703 UTC
Maximum Time: 2026 Apr 23 1705 UTC
End Time: 2026 Apr 23 1707 UTC
Duration: 4 minutes
Peak Flux: 220 sfu
Latest Penticton Noon Flux: 116 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.

14:52 UTC

Space Weather Message Code: SUM10R
Serial Number: 905
Issue Time: 2026 Apr 23 1452 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 Apr 23 1355 UTC
Maximum Time: 2026 Apr 23 1356 UTC
End Time: 2026 Apr 23 1357 UTC
Duration: 2 minutes
Peak Flux: 170 sfu
Latest Penticton Noon Flux: 116 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.

09:14 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1476
Issue Time: 2026 Apr 23 0914 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 Apr 23 0859 UTC
Estimated Velocity: 722 km/s

Comment: Report from San Vito



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.

08:59 UTC

Space Weather Message Code: SUM10R
Serial Number: 904
Issue Time: 2026 Apr 23 0859 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 Apr 23 0844 UTC
Maximum Time: 2026 Apr 23 0844 UTC
End Time: 2026 Apr 23 0844 UTC
Duration: 1 minutes
Peak Flux: 130 sfu
Latest Penticton Noon Flux: 116 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.

05:35 UTC

Space Weather Message Code: ALTTP4
Serial Number: 706
Issue Time: 2026 Apr 23 0535 UTC

ALERT: Type IV Radio Emission
Begin Time: 2026 Apr 23 0513 UTC

Comment: Report from San Vito



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.

05:10 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1475
Issue Time: 2026 Apr 23 0510 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 Apr 23 0450 UTC
Estimated Velocity: 1033 km/s

Comment: Report from San Vito



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.

04:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3683
Issue Time: 2026 Apr 23 0459 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3682
Begin Time: 2026 Apr 19 1920 UTC
Yesterday Maximum 2MeV Flux: 4922 pfu



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

среда, 22 апреля 2026

05:03 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3682
Issue Time: 2026 Apr 22 0503 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3681
Begin Time: 2026 Apr 19 1920 UTC
Yesterday Maximum 2MeV Flux: 4987 pfu



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

вторник, 21 апреля 2026

16:51 UTC

Space Weather Message Code: WARK04
Serial Number: 5326
Issue Time: 2026 Apr 21 1651 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5325
Valid From: 2026 Apr 20 0805 UTC
Now Valid Until: 2026 Apr 21 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.

13:41 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3681
Issue Time: 2026 Apr 21 1341 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3680
Begin Time: 2026 Apr 19 1920 UTC
Yesterday Maximum 2MeV Flux: 1344 pfu



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

05:45 UTC

Space Weather Message Code: WARK04
Serial Number: 5325
Issue Time: 2026 Apr 21 0545 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5324
Valid From: 2026 Apr 20 0805 UTC
Now Valid Until: 2026 Apr 21 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.

05:44 UTC

Space Weather Message Code: WARK05
Serial Number: 2229
Issue Time: 2026 Apr 21 0544 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2228
Valid From: 2026 Apr 21 0110 UTC
Now Valid Until: 2026 Apr 21 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.

01:53 UTC

Space Weather Message Code: ALTK05
Serial Number: 2012
Issue Time: 2026 Apr 21 0153 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 21 0148 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.

01:10 UTC

Space Weather Message Code: WARK04
Serial Number: 5324
Issue Time: 2026 Apr 21 0110 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5323
Valid From: 2026 Apr 20 0805 UTC
Now Valid Until: 2026 Apr 21 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.

01:10 UTC

Space Weather Message Code: WARK05
Serial Number: 2228
Issue Time: 2026 Apr 21 0110 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Apr 21 0110 UTC
Valid To: 2026 Apr 21 0600 UTC
Warning Condition: Persistence
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.

понедельник, 20 апреля 2026

20:23 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3680
Issue Time: 2026 Apr 20 2023 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3679
Begin Time: 2026 Apr 19 1920 UTC
Yesterday Maximum 2MeV Flux: 1297 pfu



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

19:34 UTC

Space Weather Message Code: ALTK05

Serial Number: 1783

Issue Time: 2026-04-20T19:34:00



ALERT: Geomagnetic K-index of 5
THRESHOLD: 2026-04-20 19:34 UTC
ISSUED BY: Forecaster User
SYNOPTIC PERIOD: 1800-2100
ACTIVE WARNING: YES
NOAA SCALE: G1 - Minor
COMMENT:




G1 - Minor

17:36 UTC

Space Weather Message Code: ALTK05

Serial Number: 1782

Issue Time: 2026-04-20T17:36:00



ALERT: Geomagnetic K-index of 5
THRESHOLD: 2026-04-20 17:34 UTC
ISSUED BY: Forecaster User
SYNOPTIC PERIOD: 1500-1800
ACTIVE WARNING: YES
NOAA SCALE: G1 - Minor
COMMENT:




G1 - Minor

17:21 UTC

Space Weather Message Code: WARK04

Serial Number: 5001

Issue Time: 2026-04-20T17:21:00



EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5323
Valid From: 2026-04-20T08:05:00
Now Valid Until: 2026-04-21 03:00
Warning Condition: Persistence
Extended 2026-04-20 17:21 by Forecaster User



Extended 2026-04-20 17:21 by Forecaster User

17:20 UTC

Space Weather Message Code: WARK05

Serial Number: 2065

Issue Time: 2026-04-20T17:20:00



WARNING: Geomagnetic K-index of 5 expected
ISSUED BY: Forecaster User
VALID FROM: 2026-04-20 17:20 UTC
VALID TO: 2026-04-20 23:59 UTC
WARNING CONDITIONS: Onset
NOAA SCALE: G1 - Minor
COMMENT:




G1 - Minor

14:20 UTC

Space Weather Message Code: WARK04
Serial Number: 5323
Issue Time: 2026 Apr 20 1420 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5322
Valid From: 2026 Apr 20 0805 UTC
Now Valid Until: 2026 Apr 20 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.

08:19 UTC

Space Weather Message Code: ALTK04
Serial Number: 2651
Issue Time: 2026 Apr 20 0819 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Apr 20 0820 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes

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

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

08:05 UTC

Space Weather Message Code: WARK04
Serial Number: 5322
Issue Time: 2026 Apr 20 0805 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 20 0805 UTC
Valid To: 2026 Apr 20 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.

воскресенье, 19 апреля 2026

19:47 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3679
Issue Time: 2026 Apr 19 1947 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 Apr 19 1920 UTC
Station: GOES19




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

09:00 UTC

Space Weather Message Code: ALTK06
Serial Number: 714
Issue Time: 2026 Apr 19 0900 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Apr 19 0859 UTC
Synoptic Period: 0600-0900 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.

08:49 UTC

Space Weather Message Code: WARK05
Serial Number: 2227
Issue Time: 2026 Apr 19 0849 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2226
Valid From: 2026 Apr 18 2348 UTC
Now Valid Until: 2026 Apr 19 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.

08:49 UTC

Space Weather Message Code: WARK06
Serial Number: 655
Issue Time: 2026 Apr 19 0849 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 Apr 19 0848 UTC
Valid To: 2026 Apr 19 1500 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

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

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

08:49 UTC

Space Weather Message Code: WARK04
Serial Number: 5321
Issue Time: 2026 Apr 19 0849 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5320
Valid From: 2026 Apr 18 0157 UTC
Now Valid Until: 2026 Apr 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.

06:50 UTC

Space Weather Message Code: ALTK05
Serial Number: 2011
Issue Time: 2026 Apr 19 0650 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 19 0650 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.

06:04 UTC

Space Weather Message Code: ALTK05
Serial Number: 2010
Issue Time: 2026 Apr 19 0604 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 19 0559 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.

06:04 UTC

Space Weather Message Code: WARK05
Serial Number: 2226
Issue Time: 2026 Apr 19 0604 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2225
Valid From: 2026 Apr 18 2348 UTC
Now Valid Until: 2026 Apr 19 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 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.

06:04 UTC

Space Weather Message Code: WARK04
Serial Number: 5320
Issue Time: 2026 Apr 19 0604 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5319
Valid From: 2026 Apr 18 0157 UTC
Now Valid Until: 2026 Apr 19 1500 UTC
Warning Condition: Persistence

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

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

суббота, 18 апреля 2026

23:50 UTC

Space Weather Message Code: WARK05
Serial Number: 2225
Issue Time: 2026 Apr 18 2350 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Apr 18 2348 UTC
Valid To: 2026 Apr 19 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.

22:46 UTC

Space Weather Message Code: WARK04
Serial Number: 5319
Issue Time: 2026 Apr 18 2246 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5318
Valid From: 2026 Apr 18 0157 UTC
Now Valid Until: 2026 Apr 19 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.

11:24 UTC

Space Weather Message Code: ALTK05
Serial Number: 2009
Issue Time: 2026 Apr 18 1124 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 18 1124 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.

08:25 UTC

Space Weather Message Code: ALTK06
Serial Number: 713
Issue Time: 2026 Apr 18 0825 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Apr 18 0825 UTC
Synoptic Period: 0600-0900 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.

07:52 UTC

Space Weather Message Code: WARK06
Serial Number: 654
Issue Time: 2026 Apr 18 0752 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 Apr 18 0751 UTC
Valid To: 2026 Apr 18 1500 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

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

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

07:41 UTC

Space Weather Message Code: ALTK05
Serial Number: 2008
Issue Time: 2026 Apr 18 0741 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 18 0740 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.

05:28 UTC

Space Weather Message Code: ALTK05
Serial Number: 2007
Issue Time: 2026 Apr 18 0528 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 18 0525 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.

04:14 UTC

Space Weather Message Code: ALTK04
Serial Number: 2650
Issue Time: 2026 Apr 18 0414 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Apr 18 0414 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes

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

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

03:17 UTC

Space Weather Message Code: WARK05
Serial Number: 2224
Issue Time: 2026 Apr 18 0317 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Apr 18 0317 UTC
Valid To: 2026 Apr 18 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.

01:58 UTC

Space Weather Message Code: WARK04
Serial Number: 5318
Issue Time: 2026 Apr 18 0158 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 18 0157 UTC
Valid To: 2026 Apr 18 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.

пятница, 17 апреля 2026

07:31 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3678
Issue Time: 2026 Apr 17 0731 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3677
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 2407 pfu



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

четверг, 16 апреля 2026

22:09 UTC

Space Weather Message Code: WATA20
Serial Number: 1108
Issue Time: 2026 Apr 16 2209 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Apr 17: G2 (Moderate) Apr 18: G2 (Moderate) Apr 19: 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.

13:23 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3677
Issue Time: 2026 Apr 16 1323 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3676
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 3248 pfu



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

среда, 15 апреля 2026

21:43 UTC

Space Weather Message Code: WATA30
Serial Number: 271
Issue Time: 2026 Apr 15 2143 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Apr 16: None (Below G1) Apr 17: G2 (Moderate) Apr 18: 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 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.

07:56 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3676
Issue Time: 2026 Apr 15 0756 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3675
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 1705 pfu



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

вторник, 14 апреля 2026

11:37 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3675
Issue Time: 2026 Apr 14 1137 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3674
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 1650 pfu



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

понедельник, 13 апреля 2026

11:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3674
Issue Time: 2026 Apr 13 1101 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3673
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 1610 pfu



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

воскресенье, 12 апреля 2026

13:17 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3673
Issue Time: 2026 Apr 12 1317 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3672
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 1082 pfu



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

09:45 UTC

Space Weather Message Code: WARK04
Serial Number: 5317
Issue Time: 2026 Apr 12 0945 UTC

CANCEL WARNING: Geomagnetic K-index of 4 expected
Cancel Serial Number: 5316
Original Issue Time: 2026 Apr 10 0143 UTC

Comment: Active conditions (Kp=4) are no longer expected to occur.

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.

суббота, 11 апреля 2026

17:56 UTC

Space Weather Message Code: WARK04
Serial Number: 5316
Issue Time: 2026 Apr 11 1756 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5315
Valid From: 2026 Apr 10 0145 UTC
Now Valid Until: 2026 Apr 12 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.

13:06 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3672
Issue Time: 2026 Apr 11 1306 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3671
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 1714 pfu



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

пятница, 10 апреля 2026

14:26 UTC

Space Weather Message Code: WARK05
Serial Number: 2223
Issue Time: 2026 Apr 10 1426 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Apr 10 1425 UTC
Valid To: 2026 Apr 11 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.

14:07 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3671
Issue Time: 2026 Apr 10 1407 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3670
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 10680 pfu



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

13:50 UTC

Space Weather Message Code: WARK04
Serial Number: 5315
Issue Time: 2026 Apr 10 1350 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5314
Valid From: 2026 Apr 10 0145 UTC
Now Valid Until: 2026 Apr 11 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.

02:08 UTC

Space Weather Message Code: ALTK04
Serial Number: 2649
Issue Time: 2026 Apr 10 0208 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Apr 10 0205 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.

01:43 UTC

Space Weather Message Code: WARK04
Serial Number: 5314
Issue Time: 2026 Apr 10 0143 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 10 0145 UTC
Valid To: 2026 Apr 10 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.

четверг, 9 апреля 2026

04:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3670
Issue Time: 2026 Apr 09 0459 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3669
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 7322 pfu



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

среда, 8 апреля 2026

04:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3669
Issue Time: 2026 Apr 08 0459 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3668
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 7359 pfu



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

02:29 UTC

Space Weather Message Code: WATA20
Serial Number: 1107
Issue Time: 2026 Apr 08 0229 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Apr 09: None (Below G1) Apr 10: G1 (Minor) Apr 11: 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.

вторник, 7 апреля 2026

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3668
Issue Time: 2026 Apr 07 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3667
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 6075 pfu



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

01:24 UTC

Space Weather Message Code: WARK04
Serial Number: 5313
Issue Time: 2026 Apr 07 0124 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 07 0124 UTC
Valid To: 2026 Apr 07 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.

понедельник, 6 апреля 2026

04:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3667
Issue Time: 2026 Apr 06 0459 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3666
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 5995 pfu



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

воскресенье, 5 апреля 2026

05:07 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3666
Issue Time: 2026 Apr 05 0507 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3665
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 2419 pfu



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

02:48 UTC

Space Weather Message Code: WARK04
Serial Number: 5312
Issue Time: 2026 Apr 05 0248 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5311
Valid From: 2026 Apr 02 0047 UTC
Now Valid Until: 2026 Apr 05 0900 UTC
Warning Condition: Persistence

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

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

суббота, 4 апреля 2026

23:56 UTC

Space Weather Message Code: WARK04
Serial Number: 5311
Issue Time: 2026 Apr 04 2356 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5310
Valid From: 2026 Apr 02 0047 UTC
Now Valid Until: 2026 Apr 05 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.

11:58 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3665
Issue Time: 2026 Apr 04 1158 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3664
Begin Time: 2026 Apr 03 0920 UTC
Yesterday Maximum 2MeV Flux: 4465 pfu



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

02:54 UTC

Space Weather Message Code: ALTK05
Serial Number: 2006
Issue Time: 2026 Apr 04 0254 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 04 0248 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.

01:46 UTC

Space Weather Message Code: SUMXM5
Serial Number: 312
Issue Time: 2026 Apr 04 0146 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Apr 04 0107 UTC
Maximum Time: 2026 Apr 04 0117 UTC
End Time: 2026 Apr 04 0123 UTC
X-ray Class: M7.5
Location: N04W04
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.

01:17 UTC

Space Weather Message Code: ALTXMF
Serial Number: 522
Issue Time: 2026 Apr 04 0117 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Apr 04 0117 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.

пятница, 3 апреля 2026

23:10 UTC

Space Weather Message Code: WARK06
Serial Number: 653
Issue Time: 2026 Apr 03 2310 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 652
Valid From: 2026 Apr 03 1551 UTC
Now Valid Until: 2026 Apr 04 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.

23:10 UTC

Space Weather Message Code: ALTK06
Serial Number: 712
Issue Time: 2026 Apr 03 2310 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Apr 03 2303 UTC
Synoptic Period: 2100-2400 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.

21:41 UTC

Space Weather Message Code: ALTK05
Serial Number: 2005
Issue Time: 2026 Apr 03 2141 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 03 2140 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.

21:02 UTC

Space Weather Message Code: WARK04
Serial Number: 5310
Issue Time: 2026 Apr 03 2102 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5309
Valid From: 2026 Apr 02 0047 UTC
Now Valid Until: 2026 Apr 04 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.

21:01 UTC

Space Weather Message Code: ALTK06
Serial Number: 711
Issue Time: 2026 Apr 03 2101 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Apr 03 2059 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.

21:01 UTC

Space Weather Message Code: WARK05
Serial Number: 2222
Issue Time: 2026 Apr 03 2101 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2221
Valid From: 2026 Apr 02 0230 UTC
Now Valid Until: 2026 Apr 04 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.

19:08 UTC

Space Weather Message Code: ALTK05
Serial Number: 2004
Issue Time: 2026 Apr 03 1908 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 03 1906 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.

16:47 UTC

Space Weather Message Code: ALTK07
Serial Number: 216
Issue Time: 2026 Apr 03 1647 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Apr 03 1646 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

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.

16:25 UTC

Space Weather Message Code: WARK07
Serial Number: 148
Issue Time: 2026 Apr 03 1625 UTC

WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2026 Apr 03 1625 UTC
Valid To: 2026 Apr 03 2359 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater

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.

15:55 UTC

Space Weather Message Code: ALTK06
Serial Number: 710
Issue Time: 2026 Apr 03 1555 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Apr 03 1555 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.

15:52 UTC

Space Weather Message Code: WARK06
Serial Number: 652
Issue Time: 2026 Apr 03 1552 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 Apr 03 1551 UTC
Valid To: 2026 Apr 03 2359 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.

15:45 UTC

Space Weather Message Code: SUMSUD
Serial Number: 298
Issue Time: 2026 Apr 03 1545 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026 Apr 03 1529 UTC
Deviation: 72 nT
Station: HAD

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

15:42 UTC

Space Weather Message Code: ALTK05
Serial Number: 2003
Issue Time: 2026 Apr 03 1542 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 03 1535 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.

15:29 UTC

Space Weather Message Code: WARSUD
Serial Number: 253
Issue Time: 2026 Apr 03 1529 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026 Apr 03 1529 UTC
Valid To: 2026 Apr 03 1550 UTC
IP Shock Passage Observed: 2026 Apr 03 1503 UTC

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

14:51 UTC

Space Weather Message Code: WARK05
Serial Number: 2221
Issue Time: 2026 Apr 03 1451 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2220
Valid From: 2026 Apr 02 0230 UTC
Now Valid Until: 2026 Apr 03 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.

09:36 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3664
Issue Time: 2026 Apr 03 0936 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 Apr 03 0920 UTC
Station: GOES19




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

08:31 UTC

Space Weather Message Code: ALTK05
Serial Number: 2002
Issue Time: 2026 Apr 03 0831 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 03 0830 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.

четверг, 2 апреля 2026

20:52 UTC

Space Weather Message Code: ALTK05
Serial Number: 2001
Issue Time: 2026 Apr 02 2052 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 02 2052 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.

17:43 UTC

Space Weather Message Code: WATA30
Serial Number: 270
Issue Time: 2026 Apr 02 1743 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Apr 02: G2 (Moderate) Apr 03: G2 (Moderate) Apr 04: 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 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.

17:11 UTC

Space Weather Message Code: ALTK06
Serial Number: 709
Issue Time: 2026 Apr 02 1711 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Apr 02 1705 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.

17:11 UTC

Space Weather Message Code: WARK04
Serial Number: 5309
Issue Time: 2026 Apr 02 1711 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5308
Valid From: 2026 Apr 02 0047 UTC
Now Valid Until: 2026 Apr 03 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.

17:11 UTC

Space Weather Message Code: WARK05
Serial Number: 2220
Issue Time: 2026 Apr 02 1711 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2219
Valid From: 2026 Apr 02 0230 UTC
Now Valid Until: 2026 Apr 03 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.

17:11 UTC

Space Weather Message Code: WARK06
Serial Number: 651
Issue Time: 2026 Apr 02 1711 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 650
Valid From: 2026 Apr 02 0753 UTC
Now Valid Until: 2026 Apr 03 0900 UTC
Warning Condition: Persistence

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

Potential Impacts: Area of impact primarily poleward of 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.

16:29 UTC

Space Weather Message Code: ALTK05
Serial Number: 2000
Issue Time: 2026 Apr 02 1629 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 02 1627 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.

14:32 UTC

Space Weather Message Code: ALTK05
Serial Number: 1999
Issue Time: 2026 Apr 02 1432 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 02 1430 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.

10:22 UTC

Space Weather Message Code: ALTK05
Serial Number: 1998
Issue Time: 2026 Apr 02 1022 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 02 1021 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.

07:53 UTC

Space Weather Message Code: WARK05
Serial Number: 2219
Issue Time: 2026 Apr 02 0753 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2218
Valid From: 2026 Apr 02 0230 UTC
Now Valid Until: 2026 Apr 02 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.

07:53 UTC

Space Weather Message Code: WARK06
Serial Number: 650
Issue Time: 2026 Apr 02 0753 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 Apr 02 0753 UTC
Valid To: 2026 Apr 02 1800 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.

07:51 UTC

Space Weather Message Code: WARK04
Serial Number: 5308
Issue Time: 2026 Apr 02 0751 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5307
Valid From: 2026 Apr 02 0047 UTC
Now Valid Until: 2026 Apr 02 2359 UTC
Warning Condition: Persistence

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

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

07:50 UTC

Space Weather Message Code: ALTK05
Serial Number: 1997
Issue Time: 2026 Apr 02 0750 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 02 0750 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.

03:01 UTC

Space Weather Message Code: ALTK05
Serial Number: 1996
Issue Time: 2026 Apr 02 0301 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 02 0300 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.

02:30 UTC

Space Weather Message Code: WARK05
Serial Number: 2218
Issue Time: 2026 Apr 02 0230 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Apr 02 0230 UTC
Valid To: 2026 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.

02:20 UTC

Space Weather Message Code: ALTK04
Serial Number: 2648
Issue Time: 2026 Apr 02 0220 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Apr 02 0220 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.

00:47 UTC

Space Weather Message Code: WARK04
Serial Number: 5307
Issue Time: 2026 Apr 02 0047 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 02 0047 UTC
Valid To: 2026 Apr 02 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.

среда, 1 апреля 2026

23:35 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1474
Issue Time: 2026 Apr 01 2335 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 Apr 01 2303 UTC
Estimated Velocity: 58 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.

13:30 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3663
Issue Time: 2026 Apr 01 1330 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3662
Begin Time: 2026 Mar 22 1430 UTC
Yesterday Maximum 2MeV Flux: 1413 pfu



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

12:33 UTC

Space Weather Message Code: SUMSUD
Serial Number: 297
Issue Time: 2026 Apr 01 1233 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026 Apr 01 1206 UTC
Deviation: 19 nT
Station: HAD

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

12:10 UTC

Space Weather Message Code: WARK04
Serial Number: 5306
Issue Time: 2026 Apr 01 1210 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 01 1210 UTC
Valid To: 2026 Apr 01 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.

11:39 UTC

Space Weather Message Code: WARSUD
Serial Number: 252
Issue Time: 2026 Apr 01 1139 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026 Apr 01 1206 UTC
Valid To: 2026 Apr 01 1236 UTC
IP Shock Passage Observed: 2026 Apr 01 1130 UTC

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

вторник, 31 марта 2026

22:13 UTC

Space Weather Message Code: WATA30
Serial Number: 269
Issue Time: 2026 Mar 31 2213 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Apr 01: G2 (Moderate) Apr 02: G1 (Minor) Apr 03: 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.

14:54 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3662
Issue Time: 2026 Mar 31 1454 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3661
Begin Time: 2026 Mar 22 1430 UTC
Yesterday Maximum 2MeV Flux: 1358 pfu



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

12:31 UTC

Space Weather Message Code: WATA20
Serial Number: 1106
Issue Time: 2026 Mar 31 1231 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Mar 31: G2 (Moderate) Apr 01: G1 (Minor) Apr 02: 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.

12:28 UTC

Space Weather Message Code: WATA20
Serial Number: 1105
Issue Time: 2026 Mar 31 1228 UTC

CANCEL WATCH: Geomagnetic Storm Category G1 Predicted
Cancel Serial Number: 1104
Original Issue Time: 2026 Mar 31 1227 UTC

Comment: cancelled due to incorrect date.

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.

12:27 UTC

Space Weather Message Code: WATA20
Serial Number: 1104
Issue Time: 2026 Mar 31 1227 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Apr 01: G2 (Moderate) Apr 02: G1 (Minor) Apr 03: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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

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

понедельник, 30 марта 2026

08:55 UTC

Space Weather Message Code: WARK04
Serial Number: 5305
Issue Time: 2026 Mar 30 0855 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5304
Valid From: 2026 Mar 29 1546 UTC
Now Valid Until: 2026 Mar 30 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.

07:42 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3661
Issue Time: 2026 Mar 30 0742 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3660
Begin Time: 2026 Mar 22 1430 UTC
Yesterday Maximum 2MeV Flux: 3755 pfu



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

06:27 UTC

Space Weather Message Code: WATA30
Serial Number: 268
Issue Time: 2026 Mar 30 0627 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Mar 30: G1 (Minor) Mar 31: G2 (Moderate) Apr 01: 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.

05:43 UTC

Space Weather Message Code: SUM10R
Serial Number: 903
Issue Time: 2026 Mar 30 0543 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 Mar 30 0254 UTC
Maximum Time: 2026 Mar 30 0304 UTC
End Time: 2026 Mar 30 0342 UTC
Duration: 48 minutes
Peak Flux: 1800 sfu
Latest Penticton Noon Flux: 158 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.

05:18 UTC

Space Weather Message Code: SUMX01
Serial Number: 214
Issue Time: 2026 Mar 30 0518 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Mar 30 0247 UTC
Maximum Time: 2026 Mar 30 0319 UTC
End Time: 2026 Mar 30 0344 UTC
X-ray Class: X1,4
Location: S27E42
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.

05:16 UTC

Space Weather Message Code: SUMX01
Serial Number: 213
Issue Time: 2026 Mar 30 0516 UTC

CANCEL SUMMARY: X-ray Event exceeded X1
Cancel Serial Number: 212
Original Issue Time: 2026 Mar 30 0353 UTC

Comment: The flare maximum was recorded as 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.

03:53 UTC

Space Weather Message Code: SUMX01
Serial Number: 212
Issue Time: 2026 Mar 30 0353 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Mar 30 0247 UTC
Maximum Time: 2026 Mar 30 0319 UTC
End Time: 2026 Mar 30 0344 UTC
X-ray Class: X1.5
Location: S27E42
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.

03:22 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1473
Issue Time: 2026 Mar 30 0322 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 Mar 30 0300 UTC
Estimated Velocity: 1872 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.

03:07 UTC

Space Weather Message Code: ALTXMF
Serial Number: 521
Issue Time: 2026 Mar 30 0307 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Mar 30 0306 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.

воскресенье, 29 марта 2026

15:48 UTC

Space Weather Message Code: WARK04
Serial Number: 5304
Issue Time: 2026 Mar 29 1548 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Mar 29 1546 UTC
Valid To: 2026 Mar 30 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.

12:47 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3660
Issue Time: 2026 Mar 29 1247 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3659
Begin Time: 2026 Mar 22 1430 UTC
Yesterday Maximum 2MeV Flux: 1596 pfu



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

03:00 UTC

Space Weather Message Code: ALTK04
Serial Number: 2647
Issue Time: 2026 Mar 29 0300 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Mar 29 0259 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.

02:07 UTC

Space Weather Message Code: WARK04
Serial Number: 5303
Issue Time: 2026 Mar 29 0207 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Mar 29 0207 UTC
Valid To: 2026 Mar 29 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.

суббота, 28 марта 2026

16:32 UTC

Space Weather Message Code: WATA20
Serial Number: 1103
Issue Time: 2026 Mar 28 1632 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Mar 29: None (Below G1) Mar 30: G1 (Minor) Mar 31: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Comment: Isolated periods of G1 (Minor) geomagnetic storming are likely on 30 Mar due to CH HSS effects.

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.

14:55 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3659
Issue Time: 2026 Mar 28 1455 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3658
Begin Time: 2026 Mar 22 1430 UTC
Yesterday Maximum 2MeV Flux: 12785 pfu



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

08:08 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1472
Issue Time: 2026 Mar 28 0808 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 Mar 28 0736 UTC
Estimated Velocity: 868 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

02:18 UTC

Space Weather Message Code: WARK04
Serial Number: 5302
Issue Time: 2026 Mar 28 0218 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Mar 28 0218 UTC
Valid To: 2026 Mar 28 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.