NOAA SWPC hälytykset, katsaukset ja varoitukset

National Oceanic and Atmospheric Administration Space Weather Prediction Center (NOAA SWPC) on Yhdysvaltain virallinen avaruussäävirasto, joka tarjoaa hälytyksiä, katsauksia ja varoituksia avaruussäähäiriöistä. Alta löydät uusimmat NOAA SWPC:n antamat avaruussäähälytykset, katsaukset ja varoitukset.

perjantaina, 1. joulukuuta 2023

20:55 UTC

Space Weather Message Code: WARK06
Serial Number: 507
Issue Time: 2023 Dec 01 2055 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 506
Valid From: 2023 Dec 01 0957 UTC
Now Valid Until: 2023 Dec 02 0600 UTC
Warning Condition: Persistence

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

Potential Impacts: Area of impact primarily poleward of 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.

20:51 UTC

Space Weather Message Code: ALTK05
Serial Number: 1541
Issue Time: 2023 Dec 01 2051 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 01 2050 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.

18:01 UTC

Space Weather Message Code: ALTK05
Serial Number: 1540
Issue Time: 2023 Dec 01 1801 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 01 1759 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.

14:57 UTC

Space Weather Message Code: WARK06
Serial Number: 506
Issue Time: 2023 Dec 01 1457 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 505
Valid From: 2023 Dec 01 0957 UTC
Now Valid Until: 2023 Dec 01 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 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.

14:57 UTC

Space Weather Message Code: WARK04
Serial Number: 4519
Issue Time: 2023 Dec 01 1457 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4518
Valid From: 2023 Dec 01 0028 UTC
Now Valid Until: 2023 Dec 02 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.

14:57 UTC

Space Weather Message Code: WARK07
Serial Number: 98
Issue Time: 2023 Dec 01 1457 UTC

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 97
Valid From: 2023 Dec 01 1116 UTC
Now Valid Until: 2023 Dec 01 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 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.

14:57 UTC

Space Weather Message Code: WARK05
Serial Number: 1844
Issue Time: 2023 Dec 01 1457 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1842
Valid From: 2023 Dec 01 0035 UTC
Now Valid Until: 2023 Dec 02 0600 UTC
Warning Condition: Persistence

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

Potential Impacts: Area of impact primarily poleward of 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.

13:49 UTC

Space Weather Message Code: ALTK06
Serial Number: 546
Issue Time: 2023 Dec 01 1349 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023 Dec 01 1349 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.

12:22 UTC

Space Weather Message Code: ALTK05
Serial Number: 1539
Issue Time: 2023 Dec 01 1222 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 01 1218 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.

11:43 UTC

Space Weather Message Code: WARK06
Serial Number: 505
Issue Time: 2023 Dec 01 1143 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 504
Valid From: 2023 Dec 01 0957 UTC
Now Valid Until: 2023 Dec 01 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.

11:43 UTC

Space Weather Message Code: WARK05
Serial Number: 1842
Issue Time: 2023 Dec 01 1143 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1841
Valid From: 2023 Dec 01 0035 UTC
Now Valid Until: 2023 Dec 01 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.

11:43 UTC

Space Weather Message Code: WARK04
Serial Number: 4518
Issue Time: 2023 Dec 01 1143 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4517
Valid From: 2023 Dec 01 0028 UTC
Now Valid Until: 2023 Dec 01 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.

11:24 UTC

Space Weather Message Code: ALTK07
Serial Number: 138
Issue Time: 2023 Dec 01 1124 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2023 Dec 01 1114 UTC
Synoptic Period: 0900-1200 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.

11:16 UTC

Space Weather Message Code: WARK07
Serial Number: 97
Issue Time: 2023 Dec 01 1116 UTC

WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2023 Dec 01 1116 UTC
Valid To: 2023 Dec 01 1500 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.

10:55 UTC

Space Weather Message Code: ALTK06
Serial Number: 545
Issue Time: 2023 Dec 01 1055 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023 Dec 01 1051 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.

10:38 UTC

Space Weather Message Code: ALTK05
Serial Number: 1538
Issue Time: 2023 Dec 01 1038 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 01 1032 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.

09:58 UTC

Space Weather Message Code: WARK06
Serial Number: 504
Issue Time: 2023 Dec 01 0958 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2023 Dec 01 0957 UTC
Valid To: 2023 Dec 01 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.

05:54 UTC

Space Weather Message Code: WARK05
Serial Number: 1841
Issue Time: 2023 Dec 01 0554 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1840
Valid From: 2023 Dec 01 0035 UTC
Now Valid Until: 2023 Dec 01 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.

04:52 UTC

Space Weather Message Code: WARK04
Serial Number: 4517
Issue Time: 2023 Dec 01 0452 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4516
Valid From: 2023 Dec 01 0028 UTC
Now Valid Until: 2023 Dec 01 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.

02:06 UTC

Space Weather Message Code: ALTK04
Serial Number: 2416
Issue Time: 2023 Dec 01 0206 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Dec 01 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.

00:36 UTC

Space Weather Message Code: WARK05
Serial Number: 1840
Issue Time: 2023 Dec 01 0036 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Dec 01 0035 UTC
Valid To: 2023 Dec 01 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.

00:32 UTC

Space Weather Message Code: SUMSUD
Serial Number: 264
Issue Time: 2023 Dec 01 0032 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2023 Dec 01 0021 UTC
Deviation: 36 nT
Station: FRD

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

00:29 UTC

Space Weather Message Code: WARK04
Serial Number: 4516
Issue Time: 2023 Dec 01 0029 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Dec 01 0028 UTC
Valid To: 2023 Dec 01 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.

00:13 UTC

Space Weather Message Code: WARSUD
Serial Number: 217
Issue Time: 2023 Dec 01 0013 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2023 Dec 01 0030 UTC
Valid To: 2023 Dec 01 0130 UTC
IP Shock Passage Observed: 2023 Dec 01 0000 UTC

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

keskiviikkona, 29. marraskuuta 2023

17:56 UTC

Space Weather Message Code: WATA50
Serial Number: 73
Issue Time: 2023 Nov 29 1756 UTC

WATCH: Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
Nov 30: G1 (Minor) Dec 01: G3 (Strong) Dec 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 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.

tiistaina, 28. marraskuuta 2023

20:27 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1257
Issue Time: 2023 Nov 28 2027 UTC

ALERT: Type II Radio Emission
Begin Time: 2023 Nov 28 1959 UTC
Estimated Velocity: 854 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.

20:20 UTC

Space Weather Message Code: SUM10R
Serial Number: 771
Issue Time: 2023 Nov 28 2020 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2023 Nov 28 1936 UTC
Maximum Time: 2023 Nov 28 1949 UTC
End Time: 2023 Nov 28 1956 UTC
Duration: 10 minutes
Peak Flux: 720 sfu
Latest Penticton Noon Flux: 187 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.

20:18 UTC

Space Weather Message Code: SUMXM5
Serial Number: 196
Issue Time: 2023 Nov 28 2018 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2023 Nov 28 1935 UTC
Maximum Time: 2023 Nov 28 1950 UTC
End Time: 2023 Nov 28 2009 UTC
X-ray Class: M9.8
Location: S17E01
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.

20:00 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1256
Issue Time: 2023 Nov 28 2000 UTC

ALERT: Type II Radio Emission
Begin Time: 2023 Nov 28 1934 UTC
Estimated Velocity: 340 km/s



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

19:58 UTC

Space Weather Message Code: SUM10R
Serial Number: 770
Issue Time: 2023 Nov 28 1958 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2023 Nov 28 1936 UTC
Maximum Time: 2023 Nov 28 1939 UTC
End Time: 2023 Nov 28 1940 UTC
Duration: 4 minutes
Peak Flux: 360 sfu
Latest Penticton Noon Flux: 187 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.

19:57 UTC

Space Weather Message Code: SUM10R
Serial Number: 769
Issue Time: 2023 Nov 28 1957 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2023 Nov 28 1921 UTC
Maximum Time: 2023 Nov 28 1923 UTC
End Time: 2023 Nov 28 1926 UTC
Duration: 5 minutes
Peak Flux: 210 sfu
Latest Penticton Noon Flux: 187 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.

19:46 UTC

Space Weather Message Code: ALTXMF
Serial Number: 329
Issue Time: 2023 Nov 28 1946 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023 Nov 28 1940 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.

19:45 UTC

Space Weather Message Code: WATA30
Serial Number: 225
Issue Time: 2023 Nov 28 1945 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Nov 29: None (Below G1) Nov 30: G1 (Minor) Dec 01: 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.

maanantaina, 27. marraskuuta 2023

18:19 UTC

Space Weather Message Code: WATA20
Serial Number: 980
Issue Time: 2023 Nov 27 1819 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Nov 28: None (Below G1) Nov 29: None (Below G1) Nov 30: 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.

sunnuntaina, 26. marraskuuta 2023

11:55 UTC

Space Weather Message Code: WARK04
Serial Number: 4515
Issue Time: 2023 Nov 26 1155 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4514
Valid From: 2023 Nov 25 0422 UTC
Now Valid Until: 2023 Nov 26 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.

08:26 UTC

Space Weather Message Code: ALTTP4
Serial Number: 617
Issue Time: 2023 Nov 26 0826 UTC

ALERT: Type IV Radio Emission
Begin Time: 2023 Nov 26 0752 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.

08:09 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1255
Issue Time: 2023 Nov 26 0809 UTC

ALERT: Type II Radio Emission
Begin Time: 2023 Nov 26 0747 UTC
Estimated Velocity: 413 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.

lauantaina, 25. marraskuuta 2023

20:06 UTC

Space Weather Message Code: ALTK06
Serial Number: 544
Issue Time: 2023 Nov 25 2006 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023 Nov 25 2003 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.

20:06 UTC

Space Weather Message Code: WARK06
Serial Number: 503
Issue Time: 2023 Nov 25 2006 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2023 Nov 25 2003 UTC
Valid To: 2023 Nov 25 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.

20:06 UTC

Space Weather Message Code: WARK05
Serial Number: 1839
Issue Time: 2023 Nov 25 2006 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1838
Valid From: 2023 Nov 25 0824 UTC
Now Valid Until: 2023 Nov 26 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.

20:06 UTC

Space Weather Message Code: WARK04
Serial Number: 4514
Issue Time: 2023 Nov 25 2006 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4513
Valid From: 2023 Nov 25 0422 UTC
Now Valid Until: 2023 Nov 26 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.

19:28 UTC

Space Weather Message Code: ALTK05
Serial Number: 1537
Issue Time: 2023 Nov 25 1928 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 1926 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.

17:36 UTC

Space Weather Message Code: ALTK05
Serial Number: 1536
Issue Time: 2023 Nov 25 1736 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 1734 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

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

14:52 UTC

Space Weather Message Code: WARK05
Serial Number: 1838
Issue Time: 2023 Nov 25 1452 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1837
Valid From: 2023 Nov 25 0824 UTC
Now Valid Until: 2023 Nov 25 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.

14:50 UTC

Space Weather Message Code: WARK04
Serial Number: 4513
Issue Time: 2023 Nov 25 1450 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4512
Valid From: 2023 Nov 25 0422 UTC
Now Valid Until: 2023 Nov 25 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.

13:27 UTC

Space Weather Message Code: ALTK05
Serial Number: 1535
Issue Time: 2023 Nov 25 1327 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 1327 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.

12:03 UTC

Space Weather Message Code: ALTK05
Serial Number: 1534
Issue Time: 2023 Nov 25 1203 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 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.

09:01 UTC

Space Weather Message Code: ALTK05
Serial Number: 1533
Issue Time: 2023 Nov 25 0901 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 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.

08:52 UTC

Space Weather Message Code: SUMSUD
Serial Number: 263
Issue Time: 2023 Nov 25 0852 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2023 Nov 25 0835 UTC
Deviation: 46 nT
Station: CNB

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

08:43 UTC

Space Weather Message Code: ALTK04
Serial Number: 2415
Issue Time: 2023 Nov 25 0843 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 25 0843 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.

08:18 UTC

Space Weather Message Code: WARK05
Serial Number: 1837
Issue Time: 2023 Nov 25 0818 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Nov 25 0824 UTC
Valid To: 2023 Nov 25 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.

08:14 UTC

Space Weather Message Code: WARSUD
Serial Number: 216
Issue Time: 2023 Nov 25 0814 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2023 Nov 25 0824 UTC
Valid To: 2023 Nov 25 0854 UTC
IP Shock Passage Observed: 2023 Nov 25 0754 UTC

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

04:23 UTC

Space Weather Message Code: WARK04
Serial Number: 4512
Issue Time: 2023 Nov 25 0423 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 25 0422 UTC
Valid To: 2023 Nov 25 1800 UTC
Warning Condition: Onset

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

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

perjantaina, 24. marraskuuta 2023

20:56 UTC

Space Weather Message Code: WATA20
Serial Number: 979
Issue Time: 2023 Nov 24 2056 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

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

keskiviikkona, 22. marraskuuta 2023

23:56 UTC

Space Weather Message Code: WARK04
Serial Number: 4511
Issue Time: 2023 Nov 22 2356 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4510
Valid From: 2023 Nov 21 0635 UTC
Now Valid Until: 2023 Nov 23 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.

11:48 UTC

Space Weather Message Code: WARK05
Serial Number: 1836
Issue Time: 2023 Nov 22 1148 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1835
Valid From: 2023 Nov 22 0448 UTC
Now Valid Until: 2023 Nov 22 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.

11:47 UTC

Space Weather Message Code: WARK04
Serial Number: 4510
Issue Time: 2023 Nov 22 1147 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4509
Valid From: 2023 Nov 21 0635 UTC
Now Valid Until: 2023 Nov 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.

08:26 UTC

Space Weather Message Code: ALTK05
Serial Number: 1532
Issue Time: 2023 Nov 22 0826 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 22 0807 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.

06:01 UTC

Space Weather Message Code: ALTK05
Serial Number: 1531
Issue Time: 2023 Nov 22 0601 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 22 0550 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.

04:49 UTC

Space Weather Message Code: WARK05
Serial Number: 1835
Issue Time: 2023 Nov 22 0449 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Nov 22 0448 UTC
Valid To: 2023 Nov 22 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.

01:53 UTC

Space Weather Message Code: WARK04
Serial Number: 4509
Issue Time: 2023 Nov 22 0153 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4508
Valid From: 2023 Nov 21 0635 UTC
Now Valid Until: 2023 Nov 22 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.

tiistaina, 21. marraskuuta 2023

16:58 UTC

Space Weather Message Code: WARK04
Serial Number: 4508
Issue Time: 2023 Nov 21 1658 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4507
Valid From: 2023 Nov 21 0635 UTC
Now Valid Until: 2023 Nov 22 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.

11:54 UTC

Space Weather Message Code: WARK04
Serial Number: 4507
Issue Time: 2023 Nov 21 1154 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4506
Valid From: 2023 Nov 21 0635 UTC
Now Valid Until: 2023 Nov 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.

08:52 UTC

Space Weather Message Code: WARK05
Serial Number: 1834
Issue Time: 2023 Nov 21 0852 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Nov 21 0851 UTC
Valid To: 2023 Nov 21 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.

08:40 UTC

Space Weather Message Code: ALTK04
Serial Number: 2414
Issue Time: 2023 Nov 21 0840 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 21 0824 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.

06:35 UTC

Space Weather Message Code: WARK04
Serial Number: 4506
Issue Time: 2023 Nov 21 0635 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 21 0635 UTC
Valid To: 2023 Nov 21 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.

maanantaina, 20. marraskuuta 2023

17:11 UTC

Space Weather Message Code: WATA20
Serial Number: 978
Issue Time: 2023 Nov 20 1711 UTC

CANCEL WATCH: Geomagnetic Storm Category G1 Predicted
Cancel Serial Number: 977
Original Issue Time: 2023 Nov 17 1654 UTC

Comment: The solar wind environment is not likely to drive G1 geomagnetic storm levels.

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.

perjantaina, 17. marraskuuta 2023

16:54 UTC

Space Weather Message Code: WATA20
Serial Number: 977
Issue Time: 2023 Nov 17 1654 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Nov 18: None (Below G1) Nov 19: G1 (Minor) Nov 20: 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.

torstaina, 16. marraskuuta 2023

17:43 UTC

Space Weather Message Code: WATA20
Serial Number: 976
Issue Time: 2023 Nov 16 1743 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Nov 17: None (Below G1) Nov 18: None (Below G1) Nov 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.

keskiviikkona, 15. marraskuuta 2023

20:13 UTC

Space Weather Message Code: WARK04
Serial Number: 4505
Issue Time: 2023 Nov 15 2013 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4504
Valid From: 2023 Nov 15 1349 UTC
Now Valid Until: 2023 Nov 16 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.

13:50 UTC

Space Weather Message Code: WARK04
Serial Number: 4504
Issue Time: 2023 Nov 15 1350 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 15 1349 UTC
Valid To: 2023 Nov 15 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.

maanantaina, 13. marraskuuta 2023

01:23 UTC

Space Weather Message Code: ALTK05
Serial Number: 1530
Issue Time: 2023 Nov 13 0123 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 13 0123 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.

01:02 UTC

Space Weather Message Code: WARK05
Serial Number: 1833
Issue Time: 2023 Nov 13 0102 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Nov 13 0102 UTC
Valid To: 2023 Nov 13 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.

sunnuntaina, 12. marraskuuta 2023

23:38 UTC

Space Weather Message Code: WARK04
Serial Number: 4503
Issue Time: 2023 Nov 12 2338 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4502
Valid From: 2023 Nov 12 0815 UTC
Now Valid Until: 2023 Nov 13 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.

08:20 UTC

Space Weather Message Code: ALTK04
Serial Number: 2413
Issue Time: 2023 Nov 12 0820 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 12 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.

08:14 UTC

Space Weather Message Code: WARK04
Serial Number: 4502
Issue Time: 2023 Nov 12 0814 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 12 0815 UTC
Valid To: 2023 Nov 12 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.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3386
Issue Time: 2023 Nov 12 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3385
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 4373 pfu

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

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

lauantaina, 11. marraskuuta 2023

06:47 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3385
Issue Time: 2023 Nov 11 0647 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3384
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 3914 pfu

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

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

perjantaina, 10. marraskuuta 2023

07:41 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3384
Issue Time: 2023 Nov 10 0741 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3383
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 2556 pfu

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

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

06:00 UTC

Space Weather Message Code: ALTK04
Serial Number: 2412
Issue Time: 2023 Nov 10 0600 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 10 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.

04:08 UTC

Space Weather Message Code: WARK04
Serial Number: 4501
Issue Time: 2023 Nov 10 0408 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 10 0408 UTC
Valid To: 2023 Nov 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.

torstaina, 9. marraskuuta 2023

21:32 UTC

Space Weather Message Code: WATA30
Serial Number: 224
Issue Time: 2023 Nov 09 2132 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Nov 10: None (Below G1) Nov 11: G2 (Moderate) Nov 12: 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.

11:31 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3383
Issue Time: 2023 Nov 09 1131 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3382
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 1233 pfu

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

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

06:26 UTC

Space Weather Message Code: WARK04
Serial Number: 4500
Issue Time: 2023 Nov 09 0626 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 09 0626 UTC
Valid To: 2023 Nov 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.

keskiviikkona, 8. marraskuuta 2023

19:47 UTC

Space Weather Message Code: WARK05
Serial Number: 1832
Issue Time: 2023 Nov 08 1947 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Nov 08 1945 UTC
Valid To: 2023 Nov 08 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.

19:35 UTC

Space Weather Message Code: ALTK04
Serial Number: 2411
Issue Time: 2023 Nov 08 1935 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 08 1935 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.

19:29 UTC

Space Weather Message Code: WARK04
Serial Number: 4499
Issue Time: 2023 Nov 08 1929 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 08 1927 UTC
Valid To: 2023 Nov 09 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.

13:52 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3382
Issue Time: 2023 Nov 08 1352 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3381
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 1524 pfu

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

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

11:55 UTC

Space Weather Message Code: WARK04
Serial Number: 4498
Issue Time: 2023 Nov 08 1155 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4497
Valid From: 2023 Nov 08 0359 UTC
Now Valid Until: 2023 Nov 08 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.

04:24 UTC

Space Weather Message Code: ALTK04
Serial Number: 2410
Issue Time: 2023 Nov 08 0424 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 08 0422 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.

03:59 UTC

Space Weather Message Code: WARK04
Serial Number: 4497
Issue Time: 2023 Nov 08 0359 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 08 0359 UTC
Valid To: 2023 Nov 08 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.

tiistaina, 7. marraskuuta 2023

16:39 UTC

Space Weather Message Code: WATA30
Serial Number: 223
Issue Time: 2023 Nov 07 1639 UTC

CANCEL WATCH: Geomagnetic Storm Category G2 Predicted
Cancel Serial Number: 222
Original Issue Time: 2023 Nov 06 2024 UTC

Comment: Current geomagnetic conditions do not warrant this Watch.

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.

16:24 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3381
Issue Time: 2023 Nov 07 1624 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2023 Nov 07 1600 UTC
Station: GOES16


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

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

02:30 UTC

Space Weather Message Code: ALTK05
Serial Number: 1529
Issue Time: 2023 Nov 07 0230 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 07 0226 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

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

00:07 UTC

Space Weather Message Code: ALTK05
Serial Number: 1528
Issue Time: 2023 Nov 07 0007 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 2359 UTC
Synoptic Period: 2100-0000 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.

maanantaina, 6. marraskuuta 2023

20:24 UTC

Space Weather Message Code: WARK06
Serial Number: 502
Issue Time: 2023 Nov 06 2024 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2023 Nov 06 2020 UTC
Valid To: 2023 Nov 07 0300 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.

20:24 UTC

Space Weather Message Code: WARK04
Serial Number: 4496
Issue Time: 2023 Nov 06 2024 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4495
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 07 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.

20:24 UTC

Space Weather Message Code: WARK05
Serial Number: 1831
Issue Time: 2023 Nov 06 2024 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1830
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 07 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 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.

20:24 UTC

Space Weather Message Code: WATA30
Serial Number: 222
Issue Time: 2023 Nov 06 2024 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Nov 06: G2 (Moderate) Nov 07: G2 (Moderate) Nov 08: 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.

19:59 UTC

Space Weather Message Code: ALTK05
Serial Number: 1527
Issue Time: 2023 Nov 06 1959 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 1958 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.

18:58 UTC

Space Weather Message Code: WARK04
Serial Number: 4495
Issue Time: 2023 Nov 06 1858 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4494
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 07 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.

18:58 UTC

Space Weather Message Code: WARK05
Serial Number: 1830
Issue Time: 2023 Nov 06 1858 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1829
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 07 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 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.

18:58 UTC

Space Weather Message Code: WATA20
Serial Number: 975
Issue Time: 2023 Nov 06 1858 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Nov 06: G2 (Moderate) Nov 07: G1 (Minor) Nov 08: 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.

17:59 UTC

Space Weather Message Code: ALTK05
Serial Number: 1526
Issue Time: 2023 Nov 06 1759 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 1759 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.

11:28 UTC

Space Weather Message Code: WARK05
Serial Number: 1829
Issue Time: 2023 Nov 06 1128 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1828
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 06 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.

11:28 UTC

Space Weather Message Code: WARK04
Serial Number: 4494
Issue Time: 2023 Nov 06 1128 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4493
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 06 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.

08:35 UTC

Space Weather Message Code: ALTK05
Serial Number: 1525
Issue Time: 2023 Nov 06 0835 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 0833 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.

05:59 UTC

Space Weather Message Code: ALTK06
Serial Number: 543
Issue Time: 2023 Nov 06 0559 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023 Nov 06 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.

03:53 UTC

Space Weather Message Code: ALTK05
Serial Number: 1524
Issue Time: 2023 Nov 06 0353 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 0342 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.

sunnuntaina, 5. marraskuuta 2023

23:40 UTC

Space Weather Message Code: ALTK05
Serial Number: 1523
Issue Time: 2023 Nov 05 2340 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 05 2340 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.

22:30 UTC

Space Weather Message Code: WARK05
Serial Number: 1828
Issue Time: 2023 Nov 05 2230 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1827
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 06 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.

22:30 UTC

Space Weather Message Code: WARK06
Serial Number: 501
Issue Time: 2023 Nov 05 2230 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 500
Valid From: 2023 Nov 05 1033 UTC
Now Valid Until: 2023 Nov 06 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.

22:29 UTC

Space Weather Message Code: WARK04
Serial Number: 4493
Issue Time: 2023 Nov 05 2229 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4492
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 06 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.

20:07 UTC

Space Weather Message Code: ALTK06
Serial Number: 542
Issue Time: 2023 Nov 05 2007 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023 Nov 05 2000 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.

18:39 UTC

Space Weather Message Code: ALTK05
Serial Number: 1522
Issue Time: 2023 Nov 05 1839 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 05 1832 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.

17:40 UTC

Space Weather Message Code: ALTK07
Serial Number: 137
Issue Time: 2023 Nov 05 1740 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2023 Nov 05 1735 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.

16:36 UTC

Space Weather Message Code: WARK07
Serial Number: 96
Issue Time: 2023 Nov 05 1636 UTC

WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2023 Nov 05 1635 UTC
Valid To: 2023 Nov 05 2359 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater - Strong to Extreme

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.

16:10 UTC

Space Weather Message Code: ALTK06
Serial Number: 541
Issue Time: 2023 Nov 05 1610 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023 Nov 05 1605 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.

15:30 UTC

Space Weather Message Code: ALTK05
Serial Number: 1521
Issue Time: 2023 Nov 05 1530 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 05 1528 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.

14:47 UTC

Space Weather Message Code: WARK06
Serial Number: 500
Issue Time: 2023 Nov 05 1447 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 499
Valid From: 2023 Nov 05 1033 UTC
Now Valid Until: 2023 Nov 05 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 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.

14:47 UTC

Space Weather Message Code: WARK04
Serial Number: 4492
Issue Time: 2023 Nov 05 1447 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4491
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 06 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.

14:47 UTC

Space Weather Message Code: WARK05
Serial Number: 1827
Issue Time: 2023 Nov 05 1447 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1826
Valid From: 2023 Nov 05 0845 UTC
Now Valid Until: 2023 Nov 06 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.

14:09 UTC

Space Weather Message Code: ALTK06
Serial Number: 540
Issue Time: 2023 Nov 05 1409 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023 Nov 05 1405 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.

12:58 UTC

Space Weather Message Code: SUMSUD
Serial Number: 262
Issue Time: 2023 Nov 05 1258 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2023 Nov 05 1232 UTC
Deviation: 22 nT
Station: NGK

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

12:41 UTC

Space Weather Message Code: ALTK05
Serial Number: 1520
Issue Time: 2023 Nov 05 1241 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 05 1240 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.

12:10 UTC

Space Weather Message Code: WARSUD
Serial Number: 215
Issue Time: 2023 Nov 05 1210 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2023 Nov 05 1220 UTC
Valid To: 2023 Nov 05 1300 UTC
IP Shock Passage Observed: 2023 Nov 05 1146 UTC

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

11:06 UTC

Space Weather Message Code: ALTK06
Serial Number: 539
Issue Time: 2023 Nov 05 1106 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023 Nov 05 1105 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.

10:33 UTC

Space Weather Message Code: WARK06
Serial Number: 499
Issue Time: 2023 Nov 05 1033 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2023 Nov 05 1033 UTC
Valid To: 2023 Nov 05 1500 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

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

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

10:20 UTC

Space Weather Message Code: ALTK05
Serial Number: 1519
Issue Time: 2023 Nov 05 1020 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 05 1018 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

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

10:03 UTC

Space Weather Message Code: ALTK04
Serial Number: 2409
Issue Time: 2023 Nov 05 1003 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 05 1002 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.

09:32 UTC

Space Weather Message Code: SUMSUD
Serial Number: 261
Issue Time: 2023 Nov 05 0932 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2023 Nov 05 0905 UTC
Deviation: 24 nT
Station: WNG

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

08:39 UTC

Space Weather Message Code: WARK05
Serial Number: 1826
Issue Time: 2023 Nov 05 0839 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Nov 05 0845 UTC
Valid To: 2023 Nov 05 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.

08:28 UTC

Space Weather Message Code: WARK04
Serial Number: 4491
Issue Time: 2023 Nov 05 0828 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 05 0845 UTC
Valid To: 2023 Nov 05 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.

08:26 UTC

Space Weather Message Code: WARSUD
Serial Number: 214
Issue Time: 2023 Nov 05 0826 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2023 Nov 05 0845 UTC
Valid To: 2023 Nov 05 0930 UTC
IP Shock Passage Observed: 2023 Nov 05 0810 UTC

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

lauantaina, 4. marraskuuta 2023

20:59 UTC

Space Weather Message Code: ALTK05
Serial Number: 1518
Issue Time: 2023 Nov 04 2059 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 04 2055 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: 1825
Issue Time: 2023 Nov 04 2020 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Nov 04 2020 UTC
Valid To: 2023 Nov 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.

19:47 UTC

Space Weather Message Code: ALTK04
Serial Number: 2408
Issue Time: 2023 Nov 04 1947 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 04 1945 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.

19:01 UTC

Space Weather Message Code: WARK04
Serial Number: 4490
Issue Time: 2023 Nov 04 1901 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 04 1900 UTC
Valid To: 2023 Nov 05 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.

17:08 UTC

Space Weather Message Code: WATA30
Serial Number: 221
Issue Time: 2023 Nov 04 1708 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Nov 05: G1 (Minor) Nov 06: G2 (Moderate) Nov 07: 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.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3380
Issue Time: 2023 Nov 04 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3379
Begin Time: 2023 Oct 29 1520 UTC
Yesterday Maximum 2MeV Flux: 2848 pfu

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

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

perjantaina, 3. marraskuuta 2023

05:46 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3379
Issue Time: 2023 Nov 03 0546 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3378
Begin Time: 2023 Oct 29 1520 UTC
Yesterday Maximum 2MeV Flux: 2376 pfu

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

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

torstaina, 2. marraskuuta 2023

13:01 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1254
Issue Time: 2023 Nov 02 1301 UTC

ALERT: Type II Radio Emission
Begin Time: 2023 Nov 02 1227 UTC
Estimated Velocity: 644 km/s

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

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.

04:17 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3378
Issue Time: 2023 Nov 02 0417 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3377
Begin Time: 2023 Oct 29 1520 UTC
Yesterday Maximum 2MeV Flux: 2118 pfu

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

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