Space Weather Alerts, Watches and Warnings
Issue Time: 2023 Feb 07 1458 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4262
Valid From: 2023 Feb 06 1925 UTC
Now Valid Until: 2023 Feb 07 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 Feb 07 0257 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4261
Valid From: 2023 Feb 06 1925 UTC
Now Valid Until: 2023 Feb 07 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: 2023 Feb 06 2101 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Feb 06 2058 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: 2023 Feb 06 1924 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 06 1925 UTC
Valid To: 2023 Feb 07 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 Feb 06 0855 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4259
Valid From: 2023 Feb 06 0220 UTC
Now Valid Until: 2023 Feb 06 1800 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Issue Time: 2023 Feb 06 0248 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Feb 06 0248 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 Feb 06 0222 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 06 0220 UTC
Valid To: 2023 Feb 06 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: 2023 Feb 03 1707 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 03 1706 UTC
Valid To: 2023 Feb 04 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 Feb 02 0301 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Feb 02 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: 2023 Feb 02 0123 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Feb 02 0122 UTC
Valid To: 2023 Feb 02 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 Feb 01 1903 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2023 Feb 01 1854 UTC
Deviation: 10 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 Jan 31 0822 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 31 0822 UTC
Valid To: 2023 Jan 31 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 Jan 26 1839 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 26 1840 UTC
Valid To: 2023 Jan 27 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 Jan 26 0326 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 26 0247 UTC
Estimated Velocity: 317 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 Jan 24 0441 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 24 0324 UTC
Estimated Velocity: 368 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 Jan 22 2049 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 22 2048 UTC
Valid To: 2023 Jan 23 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: 2023 Jan 21 1931 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 21 1930 UTC
Valid To: 2023 Jan 22 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: 2023 Jan 21 0601 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Jan 21 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 Jan 21 0601 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 21 0559 UTC
Valid To: 2023 Jan 21 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 Jan 18 1759 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4249
Valid From: 2023 Jan 17 2328 UTC
Now Valid Until: 2023 Jan 18 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 Jan 18 1455 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4248
Valid From: 2023 Jan 17 2328 UTC
Now Valid Until: 2023 Jan 18 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 Jan 18 0754 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4247
Valid From: 2023 Jan 17 2328 UTC
Now Valid Until: 2023 Jan 18 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: 2023 Jan 18 0416 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Jan 18 0415 UTC
Valid To: 2023 Jan 18 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 Jan 17 2331 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Jan 17 2330 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: 2023 Jan 17 2329 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 17 2328 UTC
Valid To: 2023 Jan 18 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: 2023 Jan 16 1142 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4245
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 16 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 Jan 15 2306 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Jan 15 2306 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 Jan 15 2259 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Jan 15 2300 UTC
Valid To: 2023 Jan 16 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 Jan 15 2259 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4244
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 16 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 Jan 15 1756 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4243
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 16 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 Jan 15 1014 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4242
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 15 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 Jan 15 1007 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2023 Jan 15 0308 UTC
Maximum Time: 2023 Jan 15 0342 UTC
End Time: 2023 Jan 15 0408 UTC
X-ray Class: M6.0
Optical Class: sf
Location: N12E54
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 Jan 15 0855 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1733
Valid From: 2023 Jan 15 0255 UTC
Now Valid Until: 2023 Jan 15 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 Jan 15 0351 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 14 2314 UTC
Estimated Velocity: 212 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 Jan 15 0349 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 15 0137 UTC
Estimated Velocity: 337 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 Jan 15 0349 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 15 0310 UTC
Estimated Velocity: 223 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 Jan 15 0334 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023 Jan 15 0332 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 Jan 15 0257 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023 Jan 15 0257 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 Jan 15 0254 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2023 Jan 15 0255 UTC
Valid To: 2023 Jan 15 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 Jan 15 0254 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4241
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 15 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 Jan 14 2058 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4240
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 15 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 Jan 14 1332 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 14 1246 UTC
Estimated Velocity: 398 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 Jan 14 0527 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4239
Valid From: 2023 Jan 13 1936 UTC
Now Valid Until: 2023 Jan 14 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 Jan 13 2226 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Jan 13 2220 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: 2023 Jan 13 1936 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 13 1936 UTC
Valid To: 2023 Jan 14 0600 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Issue Time: 2023 Jan 13 1459 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 13 1410 UTC
Estimated Velocity: 401 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 Jan 13 1056 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 13 1020 UTC
Estimated Velocity: 381 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 Jan 11 2129 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 11 2057 UTC
Estimated Velocity: 899 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 Jan 11 0429 UTC
ALERT: Type IV Radio Emission
Begin Time: 2023 Jan 11 0336 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 Jan 11 0239 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2023 Jan 11 0149 UTC
Maximum Time: 2023 Jan 11 0156 UTC
End Time: 2023 Jan 11 0201 UTC
X-ray Class: M5.6
Optical Class: 1b
Location: S13E53
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 Jan 11 0237 UTC
CANCEL SUMMARY: X-ray Event exceeded M5
Cancel Serial Number: 167
Original Issue Time: 2023 Jan 11 0205 UTC
Comment: Issued with incorrect source location. Issuing new summary with correct information.
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 Jan 11 0236 UTC
ALERT: Type II Radio Emission
Begin Time: 2023 Jan 11 0153 UTC
Estimated Velocity: 628 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 Jan 11 0211 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2023 Jan 11 0153 UTC
Maximum Time: 2023 Jan 11 0153 UTC
End Time: 2023 Jan 11 0154 UTC
Duration: 1 minutes
Peak Flux: 290 sfu
Latest Penticton Noon Flux: 193 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 Jan 11 0205 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2023 Jan 11 0149 UTC
Maximum Time: 2023 Jan 11 0156 UTC
End Time: 2023 Jan 11 0201 UTC
X-ray Class: M5.6
Optical Class: sf
Location: N25E65
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 Jan 11 0157 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023 Jan 11 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: 2023 Jan 11 0125 UTC
ALERT: Type IV Radio Emission
Begin Time: 2023 Jan 11 0059 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 Jan 10 2307 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2023 Jan 10 2246 UTC
Maximum Time: 2023 Jan 10 2246 UTC
End Time: 2023 Jan 10 2247 UTC
Duration: 1 minutes
Peak Flux: 320 sfu
Latest Penticton Noon Flux: 193 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 Jan 10 2306 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2023 Jan 10 2239 UTC
Maximum Time: 2023 Jan 10 2247 UTC
End Time: 2023 Jan 10 2251 UTC
X-ray Class: X1
Optical Class: 2b
Location: N25E65
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 Jan 10 2300 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2023 Jan 10 2239 UTC
Maximum Time: 2023 Jan 10 2247 UTC
End Time: 2023 Jan 10 2252 UTC
X-ray Class: X1
Optical Class: 2b
Location: N25E65
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: 2023 Jan 10 2249 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023 Jan 10 2246 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 Jan 10 0040 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023 Jan 10 0016 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 Jan 10 0040 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2023 Jan 10 0009 UTC
Maximum Time: 2023 Jan 10 0016 UTC
End Time: 2023 Jan 10 0022 UTC
X-ray Class: M5.1
Location: N26E93
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 Jan 09 1917 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2023 Jan 09 1837 UTC
Maximum Time: 2023 Jan 09 1850 UTC
End Time: 2023 Jan 09 1857 UTC
X-ray Class: X1.9
Optical Class: 2b
Location: S14E70
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: 2023 Jan 09 1909 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2023 Jan 09 1846 UTC
Maximum Time: 2023 Jan 09 1846 UTC
End Time: 2023 Jan 09 1850 UTC
Duration: 4 minutes
Peak Flux: 229 sfu
Latest Penticton Noon Flux: 184 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 Jan 09 1850 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023 Jan 09 1847 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.
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