Space Weather Alerts, Watches and Warnings
| 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
| 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. | | |
| 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. | | |
| 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. | | |
| 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
| 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. | | |
| 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. | | |
| 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. | | |
| 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. | | |
| Issue Time: 2023 Nov 28 1946 UTC | ALERT: 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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. | | |
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| Issue Time: 2023 Nov 25 0852 UTC | SUMMARY: Geomagnetic Sudden Impulse
Observed: 2023 Nov 25 0835 UTC
Deviation: 46 nT
Station: CNB
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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.
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| 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
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| 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
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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.
| 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. | | |
| Issue Time: 2023 Nov 07 1624 UTC | ALERT: 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| Issue Time: 2023 Nov 05 1258 UTC | SUMMARY: Geomagnetic Sudden Impulse
Observed: 2023 Nov 05 1232 UTC
Deviation: 22 nT
Station: NGK
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| Issue Time: 2023 Nov 05 0932 UTC | SUMMARY: Geomagnetic Sudden Impulse
Observed: 2023 Nov 05 0905 UTC
Deviation: 24 nT
Station: WNG
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| 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. | | |
| 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
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| 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
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2023 Nov 02 1301 UTC | ALERT: Type II Radio Emission
Begin Time: 2023 Nov 02 1227 UTC
Estimated Velocity: 644 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. | | |
| 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
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2023 Nov 01 1218 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3376
Begin Time: 2023 Oct 29 1520 UTC
Yesterday Maximum 2MeV Flux: 1705 pfu
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2023 Oct 31 1242 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3375
Begin Time: 2023 Oct 29 1520 UTC
Yesterday Maximum 2MeV Flux: 2103 pfu
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
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