Space Weather Alerts, Watches and Warnings
Issue Time: 2023 Dec 05 1755 UTC | EXTENDED WARNING: 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. | | |
Issue Time: 2023 Dec 05 1147 UTC | EXTENDED WARNING: 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. | | |
Issue Time: 2023 Dec 05 0451 UTC | WARNING: 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. | | |
Issue Time: 2023 Dec 04 0702 UTC | WARNING: 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. | | |
Issue Time: 2023 Dec 02 2121 UTC | WATCH: 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. | | |
Issue Time: 2023 Dec 02 0551 UTC | EXTENDED WARNING: 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. | | |
Issue Time: 2023 Dec 02 0550 UTC | EXTENDED WARNING: 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. | | |
Issue Time: 2023 Dec 02 0124 UTC | ALERT: 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. | | |
Issue Time: 2023 Dec 01 2338 UTC | ALERT: 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. | | |
Issue Time: 2023 Dec 01 2055 UTC | EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 506 Valid From: 2023 Dec 01 0957 UTC Now Valid Until: 2023 Dec 02 0600 UTC Warning Condition: Persistence
| 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 Dec 01 2051 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2023 Dec 01 2050 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 - Minor
| 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 Dec 01 1801 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2023 Dec 01 1759 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G1 - Minor
| 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 Dec 01 1457 UTC | EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 505 Valid From: 2023 Dec 01 0957 UTC Now Valid Until: 2023 Dec 01 2100 UTC Warning Condition: Persistence
| 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 Dec 01 1457 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4518 Valid From: 2023 Dec 01 0028 UTC Now Valid Until: 2023 Dec 02 0900 UTC Warning Condition: Persistence
| 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 Dec 01 1457 UTC | EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected Extension to Serial Number: 97 Valid From: 2023 Dec 01 1116 UTC Now Valid Until: 2023 Dec 01 2100 UTC Warning Condition: persistence
| 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 Dec 01 1457 UTC | EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1842 Valid From: 2023 Dec 01 0035 UTC Now Valid Until: 2023 Dec 02 0600 UTC Warning Condition: Persistence
| 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 Dec 01 1349 UTC | ALERT: Geomagnetic K-index of 6 Threshold Reached: 2023 Dec 01 1349 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G2 - Moderate
| 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 Dec 01 1222 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2023 Dec 01 1218 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G1 - Minor
| 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 Dec 01 1143 UTC | EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1841 Valid From: 2023 Dec 01 0035 UTC Now Valid Until: 2023 Dec 01 2100 UTC Warning Condition: Persistence
| 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 Dec 01 1143 UTC | EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 504 Valid From: 2023 Dec 01 0957 UTC Now Valid Until: 2023 Dec 01 1800 UTC Warning Condition: Persistence
| 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 Dec 01 1143 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4517 Valid From: 2023 Dec 01 0028 UTC Now Valid Until: 2023 Dec 01 2359 UTC Warning Condition: Persistence
| 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 Dec 01 1124 UTC | ALERT: Geomagnetic K-index of 7 Threshold Reached: 2023 Dec 01 1114 UTC Synoptic Period: 0900-1200 UTC Active Warning: Yes NOAA Scale: G3 - Strong
| 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 Dec 01 1116 UTC | WARNING: Geomagnetic K-index of 7 or greater expected Valid From: 2023 Dec 01 1116 UTC Valid To: 2023 Dec 01 1500 UTC Warning Condition: Onset NOAA Scale: G3 or greater
| 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 Dec 01 1055 UTC | ALERT: Geomagnetic K-index of 6 Threshold Reached: 2023 Dec 01 1051 UTC Synoptic Period: 0900-1200 UTC Active Warning: Yes NOAA Scale: G2 - Moderate
| 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 Dec 01 1038 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2023 Dec 01 1032 UTC Synoptic Period: 0900-1200 UTC Active Warning: Yes NOAA Scale: G1 - Minor
| 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 Dec 01 0958 UTC | WARNING: Geomagnetic K-Index of 6 expected Valid From: 2023 Dec 01 0957 UTC Valid To: 2023 Dec 01 1500 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate
| 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 Dec 01 0554 UTC | EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1840 Valid From: 2023 Dec 01 0035 UTC Now Valid Until: 2023 Dec 01 1500 UTC Warning Condition: Onset
| 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 Dec 01 0452 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4516 Valid From: 2023 Dec 01 0028 UTC Now Valid Until: 2023 Dec 01 2100 UTC Warning Condition: Persistence
| 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 Dec 01 0206 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2023 Dec 01 0205 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes
| 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 Dec 01 0036 UTC | WARNING: Geomagnetic K-index of 5 expected Valid From: 2023 Dec 01 0035 UTC Valid To: 2023 Dec 01 0600 UTC Warning Condition: Onset NOAA Scale: G1 - Minor
| 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 Dec 01 0032 UTC | SUMMARY: Geomagnetic Sudden Impulse Observed: 2023 Dec 01 0021 UTC Deviation: 36 nT Station: FRD
| 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 Dec 01 0013 UTC | WARNING: Geomagnetic Sudden Impulse expected Valid From: 2023 Dec 01 0030 UTC Valid To: 2023 Dec 01 0130 UTC IP Shock Passage Observed: 2023 Dec 01 0000 UTC | 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 | 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 | 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 | 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. | | |
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