Space Weather Alerts, Watches and Warnings
Issue Time: 2022 May 16 0500 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 May 16 0500 UTC Valid To: 2022 May 16 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: 2022 May 15 0253 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 May 15 0247 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: 2022 May 15 0230 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 May 15 0229 UTC Valid To: 2022 May 15 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: 2022 May 11 1939 UTC | ALERT: Type II Radio Emission Begin Time: 2022 May 11 1824 UTC Estimated Velocity: 1258 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: 2022 May 11 1857 UTC | ALERT: Type IV Radio Emission Begin Time: 2022 May 11 1824 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: 2022 May 10 1639 UTC | ALERT: Type IV Radio Emission Begin Time: 2022 May 10 1451 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: 2022 May 10 1454 UTC | ALERT: Type IV Radio Emission Begin Time: 2022 May 10 1407 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: 2022 May 10 1447 UTC | ALERT: Type II Radio Emission Begin Time: 2022 May 10 1358 UTC Estimated Velocity: 1767 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: 2022 May 10 1412 UTC | SUMMARY: X-ray Event exceeded X1 Begin Time: 2022 May 10 1350 UTC Maximum Time: 2022 May 10 1355 UTC End Time: 2022 May 10 1359 UTC X-ray Class: X1.5 Location: S29W01 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: 2022 May 10 1358 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2022 May 10 1355 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: 2022 May 09 0436 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 May 09 0436 UTC Valid To: 2022 May 09 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: 2022 May 08 1456 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3235 Begin Time: 2022 May 01 1335 UTC Yesterday Maximum 2MeV Flux: 1408 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 May 07 1232 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3234 Begin Time: 2022 May 01 1335 UTC Yesterday Maximum 2MeV Flux: 1355 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 May 06 0633 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3233 Begin Time: 2022 May 01 1335 UTC Yesterday Maximum 2MeV Flux: 1688 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 May 05 1426 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3232 Begin Time: 2022 May 01 1335 UTC Yesterday Maximum 2MeV Flux: 1468 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 May 05 0115 UTC | ALERT: Type IV Radio Emission Begin Time: 2022 May 04 2233 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: 2022 May 04 1156 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3231 Begin Time: 2022 May 01 1335 UTC Yesterday Maximum 2MeV Flux: 2317 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 May 04 0919 UTC | SUMMARY: X-ray Event exceeded M5 Begin Time: 2022 May 04 0845 UTC Maximum Time: 2022 May 04 0859 UTC End Time: 2022 May 04 0910 UTC X-ray Class: M5.7 Location: S16W19 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: 2022 May 04 0901 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2022 May 04 0858 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: 2022 May 04 0040 UTC | ALERT: Type IV Radio Emission Begin Time: 2022 May 04 0000 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: 2022 May 04 0033 UTC | SUMMARY: X-ray Event exceeded M5 Begin Time: 2022 May 04 0008 UTC Maximum Time: 2022 May 04 0019 UTC End Time: 2022 May 04 0025 UTC X-ray Class: M5.3 Location: S30E91 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: 2022 May 04 0021 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2022 May 04 0018 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: 2022 May 03 2158 UTC | ALERT: Type IV Radio Emission Begin Time: 2022 May 03 2042 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: 2022 May 03 1353 UTC | SUMMARY: X-ray Event exceeded X1 Begin Time: 2022 May 03 1309 UTC Maximum Time: 2022 May 03 1325 UTC End Time: 2022 May 03 1331 UTC X-ray Class: X1.1 Optical Class: sf 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: 2022 May 03 1330 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2022 May 03 1323 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: 2022 May 03 0826 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3230 Begin Time: 2022 May 01 1335 UTC Yesterday Maximum 2MeV Flux: 1539 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 May 02 1243 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3229 Begin Time: 2022 May 01 1335 UTC Yesterday Maximum 2MeV Flux: 1554 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 May 01 1353 UTC | ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2022 May 01 1335 UTC Station: GOES16
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 Apr 30 1440 UTC | ALERT: Type II Radio Emission Begin Time: 2022 Apr 30 1345 UTC Estimated Velocity: 1071 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: 2022 Apr 30 1429 UTC | SUMMARY: X-ray Event exceeded X1 Begin Time: 2022 Apr 30 1337 UTC Maximum Time: 2022 Apr 30 1347 UTC End Time: 2022 Apr 30 1352 UTC X-ray Class: X1.1 Location: N15W96 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: 2022 Apr 30 1347 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2022 Apr 30 1344 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: 2022 Apr 30 1023 UTC | ALERT: Type II Radio Emission Begin Time: 2022 Apr 30 0957 UTC Estimated Velocity: 1154 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: 2022 Apr 30 0542 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Apr 30 0540 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: 2022 Apr 30 0234 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4098 Valid From: 2022 Apr 30 0038 UTC Now Valid Until: 2022 Apr 30 1500 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: 2022 Apr 30 0233 UTC | WARNING: Geomagnetic K-index of 5 expected Valid From: 2022 Apr 30 0233 UTC Valid To: 2022 Apr 30 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: 2022 Apr 30 0215 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 Apr 30 0207 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: 2022 Apr 30 0038 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 30 0038 UTC Valid To: 2022 Apr 30 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: 2022 Apr 29 1255 UTC | ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2022 Apr 29 1220 UTC Station: GOES16
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 Apr 29 0748 UTC | SUMMARY: 10cm Radio Burst Begin Time: 2022 Apr 29 0720 UTC Maximum Time: 2022 Apr 29 0721 UTC End Time: 2022 Apr 29 0728 UTC Duration: 8 minutes Peak Flux: 230 sfu Latest Penticton Noon Flux: 132 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: 2022 Apr 29 0555 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4096 Valid From: 2022 Apr 29 0126 UTC Now Valid Until: 2022 Apr 29 1500 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: 2022 Apr 29 0258 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 Apr 29 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: 2022 Apr 29 0126 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 29 0126 UTC Valid To: 2022 Apr 29 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: 2022 Apr 28 0528 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4094 Valid From: 2022 Apr 27 1310 UTC Now Valid Until: 2022 Apr 28 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: 2022 Apr 28 0000 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Apr 27 2359 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: 2022 Apr 27 2339 UTC | WARNING: Geomagnetic K-index of 5 expected Valid From: 2022 Apr 27 2338 UTC Valid To: 2022 Apr 28 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: 2022 Apr 27 2054 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4093 Valid From: 2022 Apr 27 1310 UTC Now Valid Until: 2022 Apr 28 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: 2022 Apr 27 1711 UTC | SUMMARY: 10cm Radio Burst Begin Time: 2022 Apr 27 1652 UTC Maximum Time: 2022 Apr 27 1652 UTC End Time: 2022 Apr 27 1652 UTC Duration: 1 minutes Peak Flux: 280 sfu Latest Penticton Noon Flux: 150 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: 2022 Apr 27 1403 UTC | ALERT: Geomagnetic K-index of 5 Threshold Reached: 2022 Apr 27 1402 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: 2022 Apr 27 1357 UTC | WARNING: Geomagnetic K-index of 5 expected Valid From: 2022 Apr 27 1356 UTC Valid To: 2022 Apr 27 2100 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: 2022 Apr 27 1353 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 Apr 27 1350 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: 2022 Apr 27 1309 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 27 1310 UTC Valid To: 2022 Apr 27 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: 2022 Apr 26 2011 UTC | WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day: Apr 27: None (Below G1) Apr 28: None (Below G1) Apr 29: 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: 2022 Apr 24 0003 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 Apr 23 2359 UTC Synoptic Period: 2100-0000 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: 2022 Apr 23 2138 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 23 2137 UTC Valid To: 2022 Apr 24 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: 2022 Apr 23 1205 UTC | ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 Apr 23 1200 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: 2022 Apr 23 1037 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 23 1036 UTC Valid To: 2022 Apr 23 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: 2022 Apr 22 1415 UTC | ALERT: Type II Radio Emission Begin Time: 2022 Apr 22 1328 UTC Estimated Velocity: 323 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: 2022 Apr 21 2326 UTC | ALERT: Type II Radio Emission Begin Time: 2022 Apr 21 2246 UTC Estimated Velocity: 925 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: 2022 Apr 21 0547 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4089 Valid From: 2022 Apr 20 2312 UTC Now Valid Until: 2022 Apr 21 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: 2022 Apr 21 0309 UTC | ALERT: Type IV Radio Emission Begin Time: 2022 Apr 21 0215 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: 2022 Apr 21 0227 UTC | ALERT: Type II Radio Emission Begin Time: 2022 Apr 21 0157 UTC Estimated Velocity: 1132 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: 2022 Apr 21 0219 UTC | SUMMARY: 10cm Radio Burst Begin Time: 2022 Apr 21 0153 UTC Maximum Time: 2022 Apr 21 0155 UTC End Time: 2022 Apr 21 0156 UTC Duration: 3 minutes Peak Flux: 370 sfu Latest Penticton Noon Flux: 160 sfu
Comment: Castili-U
| 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: 2022 Apr 21 0211 UTC | SUMMARY: X-ray Event exceeded M5 Begin Time: 2022 Apr 21 0147 UTC Maximum Time: 2022 Apr 21 0159 UTC End Time: 2022 Apr 21 0205 UTC X-ray Class: M9.6 Location: N20E24 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: 2022 Apr 21 0158 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2022 Apr 21 0155 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: 2022 Apr 20 2312 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 20 2312 UTC Valid To: 2022 Apr 21 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: 2022 Apr 20 1328 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3226 Begin Time: 2022 Apr 16 1715 UTC Yesterday Maximum 2MeV Flux: 2219 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 Apr 20 0426 UTC | ALERT: Type II Radio Emission Begin Time: 2022 Apr 20 0355 UTC Estimated Velocity: 1630 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: 2022 Apr 20 0423 UTC | SUMMARY: X-ray Event exceeded X1 Begin Time: 2022 Apr 20 0341 UTC Maximum Time: 2022 Apr 20 0357 UTC End Time: 2022 Apr 20 0404 UTC X-ray Class: X2.2 Location: S30W90 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: 2022 Apr 20 0421 UTC | SUMMARY: 10cm Radio Burst Begin Time: 2022 Apr 20 0354 UTC Maximum Time: 2022 Apr 20 0355 UTC End Time: 2022 Apr 20 0355 UTC Duration: 1 minutes Peak Flux: 509 sfu Latest Penticton Noon Flux: 160 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: 2022 Apr 20 0358 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2022 Apr 20 0355 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: 2022 Apr 20 0155 UTC | SUMMARY: X-ray Event exceeded M5 Begin Time: 2022 Apr 20 0120 UTC Maximum Time: 2022 Apr 20 0136 UTC End Time: 2022 Apr 20 0144 UTC X-ray Class: M7.2 Location: S28W99 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: 2022 Apr 20 0133 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2022 Apr 20 0131 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: 2022 Apr 19 1031 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3225 Begin Time: 2022 Apr 16 1715 UTC Yesterday Maximum 2MeV Flux: 1646 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 Apr 19 0533 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 19 0534 UTC Valid To: 2022 Apr 19 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: 2022 Apr 19 0507 UTC | SUMMARY: 10cm Radio Burst Begin Time: 2022 Apr 19 0448 UTC Maximum Time: 2022 Apr 19 0449 UTC End Time: 2022 Apr 19 0449 UTC Duration: 1 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: 2022 Apr 18 2156 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 18 2156 UTC Valid To: 2022 Apr 19 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: 2022 Apr 18 1251 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3224 Begin Time: 2022 Apr 16 1715 UTC Yesterday Maximum 2MeV Flux: 2314 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 Apr 17 2350 UTC | ALERT: Type II Radio Emission Begin Time: 2022 Apr 17 2234 UTC Estimated Velocity: 837 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: 2022 Apr 17 1321 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3223 Begin Time: 2022 Apr 16 1715 UTC Yesterday Maximum 2MeV Flux: 1234 pfu
| Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
Issue Time: 2022 Apr 17 0420 UTC | SUMMARY: X-ray Event exceeded X1 Begin Time: 2022 Apr 17 0317 UTC Maximum Time: 2022 Apr 17 0334 UTC End Time: 2022 Apr 17 0351 UTC X-ray Class: X1.1 Location: N14E75 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: 2022 Apr 17 0415 UTC | SUMMARY: 10cm Radio Burst Begin Time: 2022 Apr 17 0328 UTC Maximum Time: 2022 Apr 17 0328 UTC End Time: 2022 Apr 17 0329 UTC Duration: 2 minutes Peak Flux: 130 sfu Latest Penticton Noon Flux: 122 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: 2022 Apr 17 0411 UTC | ALERT: Type II Radio Emission Begin Time: 2022 Apr 17 0328 UTC Estimated Velocity: 614 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: 2022 Apr 17 0329 UTC | ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2022 Apr 17 0329 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: 2022 Apr 17 0208 UTC | WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 17 0205 UTC Valid To: 2022 Apr 17 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. | | |
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