Space Weather Alerts, Watches and Warnings
Issue Time: 2024 Mar 18 1942 UTC | SUMMARY: X-ray Event exceeded M5 Begin Time: 2024 Mar 18 1902 UTC Maximum Time: 2024 Mar 18 1919 UTC End Time: 2024 Mar 18 1928 UTC X-ray Class: M6.7 Location: S12E62 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: 2024 Mar 18 1918 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2024 Mar 18 1916 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: 2024 Mar 18 1011 UTC | WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day: Mar 19: None (Below G1) Mar 20: G1 (Minor) Mar 21: 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: 2024 Mar 16 2020 UTC | SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu Begin Time: 2024 Mar 15 2050 UTC Maximum Time: 2024 Mar 16 0635 UTC End Time: 2024 Mar 16 1505 UTC Maximum 10MeV Flux: 16 pfu NOAA Scale: S1 - Minor
| Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. | | |
Issue Time: 2024 Mar 16 0555 UTC | EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected Extension to Serial Number: 548 Valid From: 2024 Mar 15 1545 UTC Now Valid Until: 2024 Mar 16 2359 UTC Warning Condition: Persistence Predicted NOAA Scale: S1 - Minor
| Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. | | |
Issue Time: 2024 Mar 15 2106 UTC | ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu Begin Time: 2024 Mar 15 2050 UTC NOAA Scale: S1 - Minor
| Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. | | |
Issue Time: 2024 Mar 15 1544 UTC | WARNING: Proton 10MeV Integral Flux above 10pfu expected Valid From: 2024 Mar 15 1545 UTC Valid To: 2024 Mar 16 0600 UTC Warning Condition: Onset Predicted NOAA Scale: S1 - Minor
| Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. | | |
Issue Time: 2024 Mar 15 0301 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 15 0259 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: 2024 Mar 15 0055 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Mar 15 0055 UTC Valid To: 2024 Mar 15 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: 2024 Mar 13 0739 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Mar 13 0738 UTC Valid To: 2024 Mar 13 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: 2024 Mar 11 1403 UTC | ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2024 Mar 11 1345 UTC Station: GOES16
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2024 Mar 11 0917 UTC | ALERT: Type II Radio Emission Begin Time: 2024 Mar 11 0853 UTC Estimated Velocity: 489 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: 2024 Mar 10 1807 UTC | SUMMARY: 10cm Radio Burst Begin Time: 2024 Mar 10 1530 UTC Maximum Time: 2024 Mar 10 1532 UTC End Time: 2024 Mar 10 1533 UTC Duration: 3 minutes Peak Flux: 150 sfu Latest Penticton Noon Flux: 135 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: 2024 Mar 10 1238 UTC | SUMMARY: X-ray Event exceeded M5 Begin Time: 2024 Mar 10 1200 UTC Maximum Time: 2024 Mar 10 1213 UTC End Time: 2024 Mar 10 1220 UTC X-ray Class: M7.4 Location: S13W35 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: 2024 Mar 10 1233 UTC | ALERT: Type II Radio Emission Begin Time: 2024 Mar 10 1208 UTC Estimated Velocity: 714 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: 2024 Mar 10 1232 UTC | SUMMARY: 10cm Radio Burst Begin Time: 2024 Mar 10 1208 UTC Maximum Time: 2024 Mar 10 1209 UTC End Time: 2024 Mar 10 1212 UTC Duration: 4 minutes Peak Flux: 340 sfu Latest Penticton Noon Flux: 135 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: 2024 Mar 10 1213 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2024 Mar 10 1211 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: 2024 Mar 09 0001 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 08 2359 UTC Synoptic Period: 2100-2400 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: 2024 Mar 08 2232 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Mar 08 2231 UTC Valid To: 2024 Mar 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: 2024 Mar 08 0552 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4556 Valid From: 2024 Mar 07 1800 UTC Now Valid Until: 2024 Mar 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: 2024 Mar 08 0405 UTC | ALERT: Type IV Radio Emission Begin Time: 2024 Mar 08 0347 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: 2024 Mar 08 0357 UTC | ALERT: Type II Radio Emission Begin Time: 2024 Mar 08 0340 UTC Estimated Velocity: 1242 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: 2024 Mar 07 2352 UTC | CANCEL ALERT: Geomagnetic K-index of 4 Cancel Serial Number: 2429 Original Issue Time: 2024 Mar 07 2344 UTC | Comment: Bad magnetometer data at the Ottawa site caused a false Kp=4 (Active) event. Disregard previous K-index of 4 alert. Kp=4 warning still valid until 08 Mar at 0600 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: 2024 Mar 07 2345 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4555 Valid From: 2024 Mar 07 1800 UTC Now Valid Until: 2024 Mar 08 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: 2024 Mar 07 2344 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 07 2343 UTC Synoptic Period: 2100-2400 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: 2024 Mar 07 2321 UTC | ALERT: Type II Radio Emission Begin Time: 2024 Mar 07 2225 UTC Estimated Velocity: 904 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: 2024 Mar 07 1756 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Mar 07 1800 UTC Valid To: 2024 Mar 07 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: 2024 Mar 06 1830 UTC | WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day: Mar 07: None (Below G1) Mar 08: None (Below G1) Mar 09: 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: 2024 Mar 06 0404 UTC | ALERT: Type II Radio Emission Begin Time: 2024 Mar 06 0333 UTC Estimated Velocity: 1516 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: 2024 Mar 03 2345 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4553 Valid From: 2024 Mar 03 1010 UTC Now Valid Until: 2024 Mar 04 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: 2024 Mar 03 2124 UTC | ALERT: Geomagnetic K-index of 6 Threshold Reached: 2024 Mar 03 2059 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: 2024 Mar 03 1955 UTC | WARNING: Geomagnetic K-Index of 6 expected Valid From: 2024 Mar 03 1954 UTC Valid To: 2024 Mar 03 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: 2024 Mar 03 1848 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 03 1844 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: 2024 Mar 03 1731 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 03 1725 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: 2024 Mar 03 1428 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 03 1424 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: 2024 Mar 03 1354 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4552 Valid From: 2024 Mar 03 1010 UTC Now Valid Until: 2024 Mar 03 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: 2024 Mar 03 1353 UTC | WARNING: Geomagnetic K-index of 5 expected Valid From: 2024 Mar 03 1352 UTC Valid To: 2024 Mar 03 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: 2024 Mar 03 1334 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 03 1330 UTC Synoptic Period: 1200-1500 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: 2024 Mar 03 1009 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Mar 03 1010 UTC Valid To: 2024 Mar 03 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: 2024 Feb 28 0936 UTC | ALERT: Type II Radio Emission Begin Time: 2024 Feb 28 0907 UTC Estimated Velocity: 432 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: 2024 Feb 27 0601 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2024 Feb 27 0559 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: 2024 Feb 27 0351 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4550 Valid From: 2024 Feb 27 0113 UTC Now Valid Until: 2024 Feb 27 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: 2024 Feb 27 0351 UTC | WARNING: Geomagnetic K-index of 5 expected Valid From: 2024 Feb 27 0350 UTC Valid To: 2024 Feb 27 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: 2024 Feb 27 0305 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Feb 27 0259 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: 2024 Feb 27 0113 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Feb 27 0113 UTC Valid To: 2024 Feb 27 0900 UTC Warning Condition: Onset
| Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. | | |
Issue Time: 2024 Feb 25 1454 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4548 Valid From: 2024 Feb 25 0545 UTC Now Valid Until: 2024 Feb 26 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: 2024 Feb 25 0545 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Feb 25 0545 UTC Valid To: 2024 Feb 25 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: 2024 Feb 22 2341 UTC | SUMMARY: 10cm Radio Burst Begin Time: 2024 Feb 22 2224 UTC Maximum Time: 2024 Feb 22 2225 UTC End Time: 2024 Feb 22 2235 UTC Duration: 11 minutes Peak Flux: 240 sfu Latest Penticton Noon Flux: 173 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: 2024 Feb 22 2253 UTC | SUMMARY: X-ray Event exceeded X1 Begin Time: 2024 Feb 22 2208 UTC Maximum Time: 2024 Feb 22 2234 UTC End Time: 2024 Feb 22 2243 UTC X-ray Class: X6.3 Optical Class: 3b Location: N22E24 NOAA Scale: R3 - Strong
| Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point. Radio - Wide area blackout of HF (high frequency) radio communication for about an hour. | | |
Issue Time: 2024 Feb 22 2230 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2024 Feb 22 2225 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: 2024 Feb 22 1917 UTC | WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day: Feb 23: None (Below G1) Feb 24: None (Below G1) Feb 25: 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: 2024 Feb 22 1226 UTC | ALERT: Type IV Radio Emission Begin Time: 2024 Feb 22 1158 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: 2024 Feb 22 1008 UTC | ALERT: Type II Radio Emission Begin Time: 2024 Feb 22 0944 UTC Estimated Velocity: 154 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: 2024 Feb 22 0647 UTC | SUMMARY: X-ray Event exceeded X1 Begin Time: 2024 Feb 22 0617 UTC Maximum Time: 2024 Feb 22 0632 UTC End Time: 2024 Feb 22 0640 UTC X-ray Class: X1.7 Optical Class: 2b Location: N14E35 NOAA Scale: R3 - Strong
| Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point. Radio - Wide area blackout of HF (high frequency) radio communication for about an hour. | | |
Issue Time: 2024 Feb 22 0631 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2024 Feb 22 0629 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: 2024 Feb 21 2321 UTC | SUMMARY: X-ray Event exceeded X1 Begin Time: 2024 Feb 21 2252 UTC Maximum Time: 2024 Feb 21 2307 UTC End Time: 2024 Feb 21 2314 UTC X-ray Class: X1.8 Location: N14E39 NOAA Scale: R3 - Strong
| Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point. Radio - Wide area blackout of HF (high frequency) radio communication for about an hour. | | |
Issue Time: 2024 Feb 21 2306 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2024 Feb 21 2304 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: 2024 Feb 21 0413 UTC | ALERT: Type II Radio Emission Begin Time: 2024 Feb 21 0201 UTC Estimated Velocity: 627 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. | | |
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