Space weather

Solar wind speed Solar wind magnetic fields Noon 10.7cm radio flux
Bt Bz

Update

Update

Update
EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-12-05 17.55 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4523
Valid From: 2023 Dec 05 0451 UTC
Now Valid Until: 2023 Dec 06 0300 UTC
Warning Condition: Persistence

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-12-05 11.47 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4522
Valid From: 2023 Dec 05 0451 UTC
Now Valid Until: 2023 Dec 05 1800 UTC
Warning Condition: Onset

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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-12-05 04.51 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Dec 05 0451 UTC
Valid To: 2023 Dec 05 1200 UTC
Warning Condition: Onset

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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-12-04 07.02 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Dec 04 0700 UTC
Valid To: 2023 Dec 04 2359 UTC
Warning Condition: Onset

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

WATCH
Geomagnetic Storm Category G2 Predicted
Issued: 2023-12-02 21.21 UTC
Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Dec 03: None (Below G1) Dec 04: G2 (Moderate) Dec 05: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-12-02 05.51 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4519
Valid From: 2023 Dec 01 0028 UTC
Now Valid Until: 2023 Dec 02 1200 UTC
Warning Condition: Persistence

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

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-12-02 05.50 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1844
Valid From: 2023 Dec 01 0035 UTC
Now Valid Until: 2023 Dec 02 1200 UTC
Warning Condition: Persistence

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-12-02 01.24 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 02 0122 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-12-01 23.38 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 01 2335 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Issued: 2023-12-01 20.55 UTC
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

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.

ALERT
Geomagnetic K-index of 5
Issued: 2023-12-01 20.51 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 01 2050 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-12-01 18.01 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 01 1759 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Issued: 2023-12-01 14.57 UTC
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

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-12-01 14.57 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 7 or greater expected
Issued: 2023-12-01 14.57 UTC
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

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.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-12-01 14.57 UTC
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

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

ALERT
Geomagnetic K-index of 6
Issued: 2023-12-01 13.49 UTC
Geomagnetic K-index of 6
Threshold Reached: 2023 Dec 01 1349 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

ALERT
Geomagnetic K-index of 5
Issued: 2023-12-01 12.22 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 01 1218 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-12-01 11.43 UTC
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

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

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Issued: 2023-12-01 11.43 UTC
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

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-12-01 11.43 UTC
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

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

ALERT
Geomagnetic K-index of 7
Issued: 2023-12-01 11.24 UTC
Geomagnetic K-index of 7
Threshold Reached: 2023 Dec 01 1114 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

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.

WARNING
Geomagnetic K-index of 7 or greater expected
Issued: 2023-12-01 11.16 UTC
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

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.

ALERT
Geomagnetic K-index of 6
Issued: 2023-12-01 10.55 UTC
Geomagnetic K-index of 6
Threshold Reached: 2023 Dec 01 1051 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

ALERT
Geomagnetic K-index of 5
Issued: 2023-12-01 10.38 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Dec 01 1032 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

WARNING
Geomagnetic K-Index of 6 expected
Issued: 2023-12-01 09.58 UTC
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

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.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-12-01 05.54 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-12-01 04.52 UTC
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

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

ALERT
Geomagnetic K-index of 4
Issued: 2023-12-01 02.06 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Dec 01 0205 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

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

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-12-01 00.36 UTC
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

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.

SUMMARY
Geomagnetic Sudden Impulse
Issued: 2023-12-01 00.32 UTC
Geomagnetic Sudden Impulse
Observed: 2023 Dec 01 0021 UTC
Deviation: 36 nT
Station: FRD

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-12-01 00.29 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Dec 01 0028 UTC
Valid To: 2023 Dec 01 0900 UTC
Warning Condition: Onset

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

WARNING
Geomagnetic Sudden Impulse expected
Issued: 2023-12-01 00.13 UTC
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

WATCH
Geomagnetic Storm Category G3 Predicted
Issued: 2023-11-29 17.56 UTC
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

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.

ALERT
Type II Radio Emission
Issued: 2023-11-28 20.27 UTC
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.

SUMMARY
10cm Radio Burst
Issued: 2023-11-28 20.20 UTC
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.

SUMMARY
X-ray Event exceeded M5
Issued: 2023-11-28 20.18 UTC
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

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

ALERT
Type II Radio Emission
Issued: 2023-11-28 20.00 UTC
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.

SUMMARY
10cm Radio Burst
Issued: 2023-11-28 19.58 UTC
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.

SUMMARY
10cm Radio Burst
Issued: 2023-11-28 19.57 UTC
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.

ALERT
X-Ray Flux exceeded M5
Issued: 2023-11-28 19.46 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2023 Nov 28 1940 UTC
NOAA Scale: R2 - Moderate

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

WATCH
Geomagnetic Storm Category G2 Predicted
Issued: 2023-11-28 19.45 UTC
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

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.

WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 2023-11-27 18.19 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-26 11.55 UTC
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

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

ALERT
Type IV Radio Emission
Issued: 2023-11-26 08.26 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-11-26 08.09 UTC
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.

WARNING
Geomagnetic K-Index of 6 expected
Issued: 2023-11-25 20.06 UTC
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

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.

ALERT
Geomagnetic K-index of 6
Issued: 2023-11-25 20.06 UTC
Geomagnetic K-index of 6
Threshold Reached: 2023 Nov 25 2003 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-25 20.06 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-25 20.06 UTC
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

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-25 19.28 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 1926 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-25 17.36 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 1734 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-25 14.52 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-25 14.50 UTC
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

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-25 13.27 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 1327 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-25 12.03 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 1159 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-25 09.01 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 25 0859 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

SUMMARY
Geomagnetic Sudden Impulse
Issued: 2023-11-25 08.52 UTC
Geomagnetic Sudden Impulse
Observed: 2023 Nov 25 0835 UTC
Deviation: 46 nT
Station: CNB

ALERT
Geomagnetic K-index of 4
Issued: 2023-11-25 08.43 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 25 0843 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes

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

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-25 08.18 UTC
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

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

WARNING
Geomagnetic Sudden Impulse expected
Issued: 2023-11-25 08.14 UTC
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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-25 04.23 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 25 0422 UTC
Valid To: 2023 Nov 25 1800 UTC
Warning Condition: Onset

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

WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 2023-11-24 20.56 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-22 23.56 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-22 11.48 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-22 11.47 UTC
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

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-22 08.26 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 22 0807 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-22 06.01 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 22 0550 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-22 04.49 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-22 01.53 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-21 16.58 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-21 11.54 UTC
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

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

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-21 08.52 UTC
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

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

ALERT
Geomagnetic K-index of 4
Issued: 2023-11-21 08.40 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 21 0824 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes

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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-21 06.35 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 21 0635 UTC
Valid To: 2023 Nov 21 1200 UTC
Warning Condition: Onset

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

CANCEL WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 2023-11-20 17.11 UTC
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.

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.

WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 2023-11-17 16.54 UTC
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

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.

WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 2023-11-16 17.43 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-15 20.13 UTC
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

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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-15 13.50 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 15 1349 UTC
Valid To: 2023 Nov 15 2100 UTC
Warning Condition: Onset

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-13 01.23 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 13 0123 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-13 01.02 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-12 23.38 UTC
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

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

ALERT
Geomagnetic K-index of 4
Issued: 2023-11-12 08.20 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 12 0820 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes

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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-12 08.14 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 12 0815 UTC
Valid To: 2023 Nov 12 2359 UTC
Warning Condition: Onset

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

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 2023-11-12 05.00 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3385
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 4373 pfu

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

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 2023-11-11 06.47 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3384
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 3914 pfu

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

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 2023-11-10 07.41 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3383
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 2556 pfu

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

ALERT
Geomagnetic K-index of 4
Issued: 2023-11-10 06.00 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 10 0559 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes

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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-10 04.08 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 10 0408 UTC
Valid To: 2023 Nov 10 1500 UTC
Warning Condition: Onset

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

WATCH
Geomagnetic Storm Category G2 Predicted
Issued: 2023-11-09 21.32 UTC
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

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.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 2023-11-09 11.31 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3382
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 1233 pfu

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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-09 06.26 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 09 0626 UTC
Valid To: 2023 Nov 09 1200 UTC
Warning Condition: Onset

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

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-08 19.47 UTC
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

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

ALERT
Geomagnetic K-index of 4
Issued: 2023-11-08 19.35 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 08 1935 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes

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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-08 19.29 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 08 1927 UTC
Valid To: 2023 Nov 09 0300 UTC
Warning Condition: Onset

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

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 2023-11-08 13.52 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3381
Begin Time: 2023 Nov 07 1600 UTC
Yesterday Maximum 2MeV Flux: 1524 pfu

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-08 11.55 UTC
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

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

ALERT
Geomagnetic K-index of 4
Issued: 2023-11-08 04.24 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Nov 08 0422 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes

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

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-08 03.59 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Nov 08 0359 UTC
Valid To: 2023 Nov 08 1200 UTC
Warning Condition: Onset

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

CANCEL WATCH
Geomagnetic Storm Category G2 Predicted
Issued: 2023-11-07 16.39 UTC
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.

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.

ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 2023-11-07 16.24 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2023 Nov 07 1600 UTC
Station: GOES16


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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-07 02.30 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 07 0226 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-07 00.07 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 2359 UTC
Synoptic Period: 2100-0000 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

WARNING
Geomagnetic K-Index of 6 expected
Issued: 2023-11-06 20.24 UTC
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

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-06 20.24 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-06 20.24 UTC
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

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.

WATCH
Geomagnetic Storm Category G2 Predicted
Issued: 2023-11-06 20.24 UTC
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

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.

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-06 19.59 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 1958 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-06 18.58 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-06 18.58 UTC
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

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.

WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 2023-11-06 18.58 UTC
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

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-06 17.59 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 1759 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-06 11.28 UTC
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

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

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-06 11.28 UTC
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

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-06 08.35 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 0833 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

ALERT
Geomagnetic K-index of 6
Issued: 2023-11-06 05.59 UTC
Geomagnetic K-index of 6
Threshold Reached: 2023 Nov 06 0559 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-06 03.53 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 06 0342 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

ALERT
Geomagnetic K-index of 5
Issued: 2023-11-05 23.40 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Nov 05 2340 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

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

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-11-05 22.30 UTC
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

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

EXTENDED WARNING
Geomagnetic K-Index of 6 expected
Issued: 2023-11-05 22.30 UTC
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

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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-11-05 22.29 UTC
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

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

ALERT
Geomagnetic K-index of 6
Issued: 2023-11-05 20.07 UTC
Geomagnetic K-index of 6
Threshold Reached: 2023 Nov 05 2000 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

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.

Table

Date Radio flux 10.7 cm SESC Sunspot number Sunspot area 10E-6 New regions GOES15 X-ray Bkgd flux Flares
X-ray Optical
C M X S 1 2 3
2023-11-05 155 81 780 1 * 6 2 0 3 1 0 0
2023-11-06 146 67 540 0 * 11 0 0 2 0 0 0
2023-11-07 145 74 380 1 * 6 0 0 2 1 0 0
2023-11-08 146 92 490 1 * 8 0 0 12 0 0 0
2023-11-09 139 93 480 0 * 2 0 0 2 0 0 0
2023-11-10 144 93 500 1 * 2 0 0 1 0 0 0
2023-11-11 142 85 510 0 * 14 1 0 12 0 0 0
2023-11-12 137 78 710 1 * 3 0 0 4 0 0 0
2023-11-13 134 85 560 1 * 11 0 0 5 0 0 0
2023-11-14 124 86 580 1 * 20 1 0 1 0 0 0
2023-11-15 119 41 210 0 * 5 0 0 0 0 0 0
2023-11-16 118 28 130 0 * 2 0 0 0 0 0 0
2023-11-17 120 26 180 1 * 3 0 0 0 0 0 0
2023-11-18 127 39 340 1 * 4 3 0 0 0 0 0
2023-11-19 140 51 400 1 * 10 0 0 6 0 0 0
2023-11-20 157 127 770 6 * 14 1 0 3 1 0 0
2023-11-21 172 138 810 1 * 12 0 0 7 0 0 0
2023-11-22 190 174 880 0 * 3 0 0 12 0 0 0
2023-11-23 194 176 1560 3 * 10 2 0 3 0 0 0
2023-11-24 178 184 1590 1 * 7 1 0 9 2 0 0
2023-11-25 176 179 1400 1 * 3 0 0 3 0 0 0
2023-11-26 180 169 1220 1 * 5 0 0 4 0 0 0
2023-11-27 187 159 885 0 * 6 0 0 2 0 0 0
2023-11-28 182 130 335 1 * 3 2 0 4 1 0 0
2023-11-29 171 164 530 3 * 10 0 0 6 0 0 0
2023-11-30 167 138 620 0 * 7 0 0 1 0 0 0
2023-12-01 162 140 640 1 * 7 2 0 2 0 0 0
2023-12-02 148 92 580 0 * 9 0 0 3 0 0 0
2023-12-03 139 107 550 2 * 4 0 0 0 0 0 0
2023-12-04 138 113 660 1 * 9 0 0 5 0 0 0
Average/Total 153 107 661 31 216 15 0 114 6 0 0

Summary graph

Flares

Solar Wind

Solar Wind

The solar wind is a stream of plasma released from the upper atmosphere of the Sun. It consists of mostly electrons, protons and alpha particles with energies usually between 1.5 and 10 keV. The stream of particles varies in density, temperature, and speed over time and over solar longitude. These particles can escape the Sun's gravity because of their high energy, from the high temperature of the corona and magnetic, electrical and electromagnetic phenomena in it.

The solar wind is divided into two components, respectively termed the slow solar wind and the fast solar wind. The slow solar wind has a velocity of about 400 km/s, a temperature of 1.4–1.6×10e6 K and a composition that is a close match to the corona. By contrast, the fast solar wind has a typical velocity of 750 km/s, a temperature of 8×10e5 K and it nearly matches the composition of the Sun's photosphere. The slow solar wind is twice as dense and more variable in intensity than the fast solar wind. The slow wind also has a more complex structure, with turbulent regions and large-scale structures.

Solar radio flux at 10.7 cm

Solar radio flux at 10.7 cm

The solar radio flux at 10.7 cm (2800 MHz) is an excellent indicator of solar activity. Often called the F10.7 index, it is one of the longest running records of solar activity. The F10.7 radio emissions originates high in the chromosphere and low in the corona of the solar atmosphere. The F10.7 correlates well with the sunspot number as well as a number of UltraViolet (UV) and visible solar irradiance records. Reported in “solar flux units”, (s.f.u.), the F10.7 can vary from below 50 s.f.u., to above 300 s.f.u., over the course of a solar cycle.

Flares

Flares

A solar flare is a sudden flash of brightness observed over the Sun's surface or the solar limb, which is interpreted as a large energy release of up to 6 × 10e25 joules of energy. They are often, but not always, followed by a colossal coronal mass ejection. The flare ejects clouds of electrons, ions, and atoms through the corona of the sun into space. These clouds typically reach Earth a day or two after the event.

Solar flares affect all layers of the solar atmosphere (photosphere, chromosphere, and corona), when the plasma medium is heated to tens of millions of kelvin, while the electrons, protons, and heavier ions are accelerated to near the speed of light. They produce radiation across the electromagnetic spectrum at all wavelengths, from radio waves to gamma rays, although most of the energy is spread over frequencies outside the visual range and for this reason the majority of the flares are not visible to the naked eye and must be observed with special instruments. Flares occur in active regions around sunspots, where intense magnetic fields penetrate the photosphere to link the corona to the solar interior. Flares are powered by the sudden (timescales of minutes to tens of minutes) release of magnetic energy stored in the corona. The same energy releases may produce coronal mass ejections (CME), although the relation between CMEs and flares is still not well established.

The frequency of occurrence of solar flares varies, from several per day when the Sun is particularly "active" to less than one every week when the Sun is "quiet", following the 11-year cycle (the solar cycle). Large flares are less frequent than smaller ones.

Classification

Solar flares are classified as A, B, C, M or X according to the peak flux (in watts per square metre, W/m2) of 100 to 800 picometre X-rays near Earth, as measured on the GOES spacecraft.

Classification Peak Flux Range at 100-800 picometer
W/m2
A < 10e-7
B 10e-7 to 10e-6
C 10e-6 to 10e-5
M 10e-5 to 10e-4
X 10e-4 to 10e-3
Z > 10e-3

An earlier flare classification is based on Hα spectral observations. The scheme uses both the intensity and emitting surface. The classification in intensity is qualitative, referring to the flares as: (f)aint, (n)ormal or (b)rilliant. The emitting surface is measured in terms of millionths of the hemisphere and is described below. (The total hemisphere area AH = 6.2 × 1012 km2.)

Classification Corrected area
(millionths of hemisphere)
S < 100
1 100 - 250
2 250 - 600
3 600 - 1200
4 > 1200

Sunspot number

Sunspots

Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They correspond to concentrations of magnetic field that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere. Sunspots usually appear in pairs, with pair members of opposite magnetic polarity. The number of sunspots varies according to the approximately 11-year solar cycle.

Sunspot populations quickly rise and more slowly fall on an irregular cycle of 11 years, although significant variations in the number of sunspots attending the 11-year period are known over longer spans of time. For example, from 1900 to the 1960s, the solar maxima trend of sunspot count has been upward; from the 1960s to the present, it has diminished somewhat. Over the last decades the Sun has had a markedly high average level of sunspot activity; it was last similarly active over 8,000 years ago.

The number of sunspots correlates with the intensity of solar radiation over the period since 1979, when satellite measurements of absolute radiative flux became available. Since sunspots are darker than the surrounding photosphere it might be expected that more sunspots would lead to less solar radiation and a decreased solar constant. However, the surrounding margins of sunspots are brighter than the average, and so are hotter; overall, more sunspots increase the Sun's solar constant or brightness. The variation caused by the sunspot cycle to solar output is relatively small, on the order of 0.1% of the solar constant (a peak-to-trough range of 1.3 W/m2 compared to 1366 W/m2 for the average solar constant).

K-indices



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3. 33 3. 33 2.



Data


Estimated Planetary

Estimated Planetary

Date A K-indices (UTC)
0h 3h 6h 9h 12h 15h 18h 21h
2023-11-06 40 4. 33 5. 67 4.
2023-11-07 18 4. 67 4. 33 2.
2023-11-08 16 2. 67 4. 00 3.
2023-11-09 12 2. 67 2. 33 3.
2023-11-10 10 2. 33 3. 67 2.
2023-11-11 5 2. 00 1. 33 1.
2023-11-12 10 0. 67 1. 33 4.
2023-11-13 16 5. 00 3. 67 1.
2023-11-14 6 2. 33 1. 00 0.
2023-11-15 12 2. 33 1. 67 2.
2023-11-16 8 1. 67 1. 00 2.
2023-11-17 3 0. 67 0. 33 0.
2023-11-18 3 0. 33 1. 00 0.
2023-11-19 4 0. 67 0. 33 1.
2023-11-20 5 1. 00 1. 00 2.
2023-11-21 18 1. 33 2. 33 4.
2023-11-22 30 4. 00 5. 00 5.
2023-11-23 7 2. 67 2. 33 2.
2023-11-24 7 1. 67 1. 67 1.
2023-11-25 38 3. 00 3. 00 4.
2023-11-26 10 4. 00 2. 33 3.
2023-11-27 7 1. 33 1. 67 2.
2023-11-28 7 2. 00 2. 00 2.
2023-11-29 5 1. 00 2. 00 2.
2023-11-30 5 1. 67 2. 00 1.
2023-12-01 56 4. 33 4. 00 4.
2023-12-02 14 5. 33 4. 00 2.
2023-12-03 11 2. 67 3. 00 3.
2023-12-04 9 2. 33 2. 33 3.
2023-12-05 14 3. 33 3. 33 2.

Middle Latitude

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

High Latitude

Date A K-indices
2023-11-06 51 3 5 6 7 3 5 5 3
2023-11-07 25 4 4 2 4 4 5 4 2
2023-11-08 21 3 3 2 6 3 3 3 2
2023-11-09 16 2 3 3 5 3 2 3 2
2023-11-10 13 3 3 4 3 4 2 0 0
2023-11-11 3 1 1 2 2 1 0 1 0
2023-11-12 16 0 1 5 5 3 2 1 2
2023-11-13 11 3 3 2 2 4 3 1 0
2023-11-14 5 1 1 1 1 1 3 2 0
2023-11-15 22 1 2 3 4 6 4 2 2
2023-11-16 12 1 1 4 3 4 2 1 2
2023-11-17 2 0 1 1 2 1 0 0 0
2023-11-18 1 0 1 1 1 0 0 0 0
2023-11-19 4 0 0 3 3 1 0 0 0
2023-11-20 4 0 0 3 2 1 1 0 0
2023-11-21 31 0 1 5 3 6 6 2 3
2023-11-22 60 3 6 7 6 5 6 4 2
2023-11-23 8 1 1 4 3 3 1 0 0
2023-11-24 6 0 1 0 1 3 3 2 2
2023-11-25 61 2 2 7 6 6 6 6 3
2023-11-26 12 3 1 4 4 3 1 1 1
2023-11-27 9 0 0 4 2 4 2 1 0
2023-11-28 11 1 0 2 5 2 3 2 1
2023-11-29 8 0 1 3 3 4 1 1 0
2023-11-30 6 0 2 3 2 3 0 0 0
2023-12-01 57 3 3 4 7 6 6 6 3
2023-12-02 8 4 3 2 2 0 2 0 1
2023-12-03 8 2 2 3 2 1 2 2 2
2023-12-04 14 1 1 4 4 4 3 2 1
2023-12-05 1 4 2 6 6 4

About

The K-index quantifies disturbances in the horizontal component of earth's magnetic field with an integer in the range 0–9 with 1 being calm and 5 or more indicating a geomagnetic storm. It is derived from the maximum fluctuations of horizontal components observed on a magnetometer during a three-hour interval. The label K comes from the German word Kennziffer meaning “characteristic digit”. The K-index was introduced by Julius Bartels in 1938.

The Estimated 3-hour Planetary Kp-index is derived at the NOAA Space Weather Prediction Center using data from the following ground-based magnetometers:

  • Sitka, Alaska
  • Meanook, Canada
  • Ottawa, Canada
  • Fredericksburg, Virginia
  • Hartland, UK
  • Wingst, Germany
  • Niemegk, Germany
  • Canberra, Australia

These data are made available thanks to the cooperative efforts between SWPC and data providers around the world, which currently includes the U.S. Geological Survey, Natural Resources Canada (NRCAN), the British Geological Survey, the German Research Centre for Geosciences (GFZ), and Geoscience Australia. Important magnetometer observations are also contributed by the Institut de Physique du Globe de Paris and the Korean Space Weather Center K-index Watches are issued when the highest predicted NOAA estimated Kp-indices for a day are K = 5, 6, 7, or >= 8 and is reported in terms of the NOAA G scale. K-index Warnings are issued when NOAA estimated Kp-indices of 4, 5, 6, and 7 or greater are expected. K-index Alerts are issued when the NOAA estimated Kp-indices reach 4, 5, 6, 7, 8, or 9.


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