Space weather

Solar wind speed Solar wind magnetic fields Noon 10.7cm radio flux
Bt Bz

Update

Update

Update
WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-31 08.22 UTC
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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-26 18.39 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-26 03.26 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-24 04.41 UTC
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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-22 20.49 UTC
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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-21 19.31 UTC
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.

ALERT
Geomagnetic K-index of 4
Issued: 2023-01-21 06.01 UTC
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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-21 06.01 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-18 17.59 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-18 14.55 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-18 07.54 UTC
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.

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-01-18 04.16 UTC
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.

ALERT
Geomagnetic K-index of 4
Issued: 2023-01-17 23.31 UTC
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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-17 23.29 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-16 11.42 UTC
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.

ALERT
Geomagnetic K-index of 5
Issued: 2023-01-15 23.06 UTC
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.

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-01-15 22.59 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-15 22.59 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-15 17.56 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-15 10.14 UTC
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.

SUMMARY
X-ray Event exceeded M5
Issued: 2023-01-15 10.07 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-01-15 08.55 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-15 03.51 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-15 03.49 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-15 03.49 UTC
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.

ALERT
X-Ray Flux exceeded M5
Issued: 2023-01-15 03.34 UTC
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.

ALERT
Geomagnetic K-index of 5
Issued: 2023-01-15 02.57 UTC
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.

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-01-15 02.54 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-15 02.54 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-14 20.58 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-14 13.32 UTC
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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-14 05.27 UTC
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.

ALERT
Geomagnetic K-index of 4
Issued: 2023-01-13 22.26 UTC
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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-13 19.36 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-13 14.59 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-13 10.56 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-11 21.29 UTC
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.

ALERT
Type IV Radio Emission
Issued: 2023-01-11 04.29 UTC
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.

SUMMARY
X-ray Event exceeded M5
Issued: 2023-01-11 02.39 UTC
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.

CANCEL SUMMARY
X-ray Event exceeded M5
Issued: 2023-01-11 02.37 UTC
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.

ALERT
Type II Radio Emission
Issued: 2023-01-11 02.36 UTC
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.

SUMMARY
10cm Radio Burst
Issued: 2023-01-11 02.11 UTC
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.

SUMMARY
X-ray Event exceeded M5
Issued: 2023-01-11 02.05 UTC
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.

ALERT
X-Ray Flux exceeded M5
Issued: 2023-01-11 01.57 UTC
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.

ALERT
Type IV Radio Emission
Issued: 2023-01-11 01.25 UTC
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.

SUMMARY
10cm Radio Burst
Issued: 2023-01-10 23.07 UTC
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.

SUMMARY
X-ray Event exceeded M5
Issued: 2023-01-10 23.06 UTC
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.

SUMMARY
X-ray Event exceeded X1
Issued: 2023-01-10 23.00 UTC
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.

ALERT
X-Ray Flux exceeded M5
Issued: 2023-01-10 22.49 UTC
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.

ALERT
X-Ray Flux exceeded M5
Issued: 2023-01-10 00.40 UTC
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.

SUMMARY
X-ray Event exceeded M5
Issued: 2023-01-10 00.40 UTC
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.

SUMMARY
X-ray Event exceeded X1
Issued: 2023-01-09 19.17 UTC
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.

SUMMARY
10cm Radio Burst
Issued: 2023-01-09 19.09 UTC
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.

ALERT
X-Ray Flux exceeded M5
Issued: 2023-01-09 18.50 UTC
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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-08 13.17 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 08 1317 UTC
Valid To: 2023 Jan 08 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.

SUMMARY
X-ray Event exceeded X1
Issued: 2023-01-06 01.49 UTC
X-ray Event exceeded X1
Begin Time: 2023 Jan 06 0043 UTC
Maximum Time: 2023 Jan 06 0057 UTC
End Time: 2023 Jan 06 0107 UTC
X-ray Class: X1.2
Optical Class: 2b
Location: S18E68
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.

SUMMARY
10cm Radio Burst
Issued: 2023-01-06 01.25 UTC
10cm Radio Burst
Begin Time: 2023 Jan 06 0055 UTC
Maximum Time: 2023 Jan 06 0056 UTC
End Time: 2023 Jan 06 0058 UTC
Duration: 3 minutes
Peak Flux: 420 sfu
Latest Penticton Noon Flux: 154 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.

ALERT
X-Ray Flux exceeded M5
Issued: 2023-01-06 01.06 UTC
X-Ray Flux exceeded M5
Threshold Reached: 2023 Jan 06 0057 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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-05 11.02 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 05 1100 UTC
Valid To: 2023 Jan 05 2359 UTC
Warning Condition: Onset

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-01-05 11.02 UTC
Geomagnetic K-index of 5 expected
Valid From: 2023 Jan 05 1100 UTC
Valid To: 2023 Jan 05 1800 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-04 23.54 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4235
Valid From: 2023 Jan 04 0129 UTC
Now Valid Until: 2023 Jan 05 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.

EXTENDED WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-01-04 09.02 UTC
Geomagnetic K-index of 5 expected
Extension to Serial Number: 1730
Valid From: 2023 Jan 04 0250 UTC
Now Valid Until: 2023 Jan 04 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.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-04 09.02 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4234
Valid From: 2023 Jan 04 0129 UTC
Now Valid Until: 2023 Jan 04 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.

ALERT
Geomagnetic K-index of 5
Issued: 2023-01-04 08.50 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Jan 04 0845 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.

ALERT
Geomagnetic K-index of 5
Issued: 2023-01-04 05.21 UTC
Geomagnetic K-index of 5
Threshold Reached: 2023 Jan 04 0520 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.

SUMMARY
Geomagnetic Sudden Impulse
Issued: 2023-01-04 03.51 UTC
Geomagnetic Sudden Impulse
Observed: 2023 Jan 04 0254 UTC
Deviation: 38 nT
Station: Canberra

WARNING
Geomagnetic K-index of 5 expected
Issued: 2023-01-04 02.52 UTC
Geomagnetic K-index of 5 expected
Valid From: 2023 Jan 04 0250 UTC
Valid To: 2023 Jan 04 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.

ALERT
Geomagnetic K-index of 4
Issued: 2023-01-04 02.37 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Jan 04 0236 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.

WARNING
Geomagnetic Sudden Impulse expected
Issued: 2023-01-04 02.33 UTC
Geomagnetic Sudden Impulse expected
Valid From: 2023 Jan 04 0230 UTC
Valid To: 2023 Jan 04 0300 UTC
IP Shock Passage Observed: 2023 Jan 04 0151 UTC

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-04 01.29 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 04 0129 UTC
Valid To: 2023 Jan 04 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.

ALERT
Type IV Radio Emission
Issued: 2023-01-03 07.28 UTC
Type IV Radio Emission
Begin Time: 2023 Jan 03 0642 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.

ALERT
Type II Radio Emission
Issued: 2023-01-03 07.22 UTC
Type II Radio Emission
Begin Time: 2023 Jan 03 0627 UTC
Estimated Velocity: 623 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.

SUMMARY
10cm Radio Burst
Issued: 2023-01-03 06.53 UTC
10cm Radio Burst
Begin Time: 2023 Jan 03 0626 UTC
Maximum Time: 2023 Jan 03 0627 UTC
End Time: 2023 Jan 03 0630 UTC
Duration: 4 minutes
Peak Flux: 229 sfu
Latest Penticton Noon Flux: 146 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.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 2023-01-03 04.59 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3290
Begin Time: 2022 Dec 24 1415 UTC
Yesterday Maximum 2MeV Flux: 3546 pfu

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

WATCH
Geomagnetic Storm Category G1 Predicted
Issued: 2023-01-02 21.17 UTC
Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Jan 03: None (Below G1) Jan 04: G1 (Minor) Jan 05: 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.

CONTINUED ALERT
Electron 2MeV Integral Flux exceeded 1000pfu
Issued: 2023-01-02 04.59 UTC
Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3289
Begin Time: 2022 Dec 24 1415 UTC
Yesterday Maximum 2MeV Flux: 2888 pfu

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

EXTENDED WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-01 23.54 UTC
Geomagnetic K-index of 4 expected
Extension to Serial Number: 4232
Valid From: 2023 Jan 01 2131 UTC
Now Valid Until: 2023 Jan 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.

ALERT
Geomagnetic K-index of 4
Issued: 2023-01-01 21.44 UTC
Geomagnetic K-index of 4
Threshold Reached: 2023 Jan 01 2144 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.

WARNING
Geomagnetic K-index of 4 expected
Issued: 2023-01-01 21.32 UTC
Geomagnetic K-index of 4 expected
Valid From: 2023 Jan 01 2131 UTC
Valid To: 2023 Jan 01 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.

Table

Date Radio flux 10.7 cm SESC Sunspot number Sunspot area 10E-6 New regions GOES15 X-ray Bkgd flux Flares
X-ray Optical
C M X S 1 2 3
2023-01-01 153 94 1220 1 * 9 0 0 12 0 0 0
2023-01-02 146 94 1100 0 * 9 0 0 7 1 0 0
2023-01-03 149 89 930 0 * 5 0 0 1 0 0 0
2023-01-04 151 86 550 0 * 3 0 0 4 0 1 0
2023-01-05 154 103 690 2 * 7 0 0 6 0 0 0
2023-01-06 172 101 920 0 * 9 0 1 18 0 1 0
2023-01-07 179 104 1210 0 * 13 1 0 7 1 0 0
2023-01-08 184 117 1810 1 * 13 4 0 23 1 0 0
2023-01-09 191 142 2290 1 * 13 3 1 14 3 0 1
2023-01-10 193 201 2180 2 * 15 6 1 21 0 2 0
2023-01-11 195 183 2060 0 * 5 4 0 16 2 0 0
2023-01-12 212 151 1430 1 * 11 3 0 19 2 0 0
2023-01-13 209 181 1650 4 * 7 2 0 20 3 0 0
2023-01-14 228 170 1750 0 * 5 3 0 15 2 0 0
2023-01-15 234 177 1820 2 * 3 2 0 16 0 1 0
2023-01-16 228 186 2410 0 * 5 0 0 9 0 0 0
2023-01-17 222 185 2290 1 * 8 1 0 5 1 0 0
2023-01-18 220 164 2210 1 * 7 1 0 10 0 0 0
2023-01-19 219 166 2020 2 * 7 3 0 10 0 0 0
2023-01-20 218 197 1720 1 * 6 0 0 6 0 0 0
2023-01-21 209 194 1390 0 * 8 0 0 8 0 0 0
2023-01-22 199 166 1250 1 * 7 2 0 7 2 0 0
2023-01-23 189 144 1240 0 * 6 0 0 5 0 0 0
2023-01-24 180 127 1380 1 * 9 0 0 15 0 0 0
2023-01-25 172 136 1320 2 * 7 3 0 15 1 0 0
2023-01-26 151 104 280 0 * 10 1 0 7 0 0 0
2023-01-27 145 84 170 0 * 3 0 0 4 0 0 0
2023-01-28 138 76 120 2 * 4 0 0 2 0 0 0
2023-01-29 137 80 160 1 * 2 0 0 0 0 0 0
2023-01-30 136 67 290 1 * 11 0 0 8 0 0 0
Average/Total 184 136 1329 27 227 39 3 310 19 5 1

Summary graph

Flares

Solar Wind

Solar Wind

The solar wind is a stream of plasma released from the upper atmosphere of the Sun. It consists of mostly electrons, protons and alpha particles with energies usually between 1.5 and 10 keV. The stream of particles varies in density, temperature, and speed over time and over solar longitude. These particles can escape the Sun's gravity because of their high energy, from the high temperature of the corona and magnetic, electrical and electromagnetic phenomena in it.

The solar wind is divided into two components, respectively termed the slow solar wind and the fast solar wind. The slow solar wind has a velocity of about 400 km/s, a temperature of 1.4–1.6×10e6 K and a composition that is a close match to the corona. By contrast, the fast solar wind has a typical velocity of 750 km/s, a temperature of 8×10e5 K and it nearly matches the composition of the Sun's photosphere. The slow solar wind is twice as dense and more variable in intensity than the fast solar wind. The slow wind also has a more complex structure, with turbulent regions and large-scale structures.

Solar radio flux at 10.7 cm

Solar radio flux at 10.7 cm

The solar radio flux at 10.7 cm (2800 MHz) is an excellent indicator of solar activity. Often called the F10.7 index, it is one of the longest running records of solar activity. The F10.7 radio emissions originates high in the chromosphere and low in the corona of the solar atmosphere. The F10.7 correlates well with the sunspot number as well as a number of UltraViolet (UV) and visible solar irradiance records. Reported in “solar flux units”, (s.f.u.), the F10.7 can vary from below 50 s.f.u., to above 300 s.f.u., over the course of a solar cycle.

Flares

Flares

A solar flare is a sudden flash of brightness observed over the Sun's surface or the solar limb, which is interpreted as a large energy release of up to 6 × 10e25 joules of energy. They are often, but not always, followed by a colossal coronal mass ejection. The flare ejects clouds of electrons, ions, and atoms through the corona of the sun into space. These clouds typically reach Earth a day or two after the event.

Solar flares affect all layers of the solar atmosphere (photosphere, chromosphere, and corona), when the plasma medium is heated to tens of millions of kelvin, while the electrons, protons, and heavier ions are accelerated to near the speed of light. They produce radiation across the electromagnetic spectrum at all wavelengths, from radio waves to gamma rays, although most of the energy is spread over frequencies outside the visual range and for this reason the majority of the flares are not visible to the naked eye and must be observed with special instruments. Flares occur in active regions around sunspots, where intense magnetic fields penetrate the photosphere to link the corona to the solar interior. Flares are powered by the sudden (timescales of minutes to tens of minutes) release of magnetic energy stored in the corona. The same energy releases may produce coronal mass ejections (CME), although the relation between CMEs and flares is still not well established.

The frequency of occurrence of solar flares varies, from several per day when the Sun is particularly "active" to less than one every week when the Sun is "quiet", following the 11-year cycle (the solar cycle). Large flares are less frequent than smaller ones.

Classification

Solar flares are classified as A, B, C, M or X according to the peak flux (in watts per square metre, W/m2) of 100 to 800 picometre X-rays near Earth, as measured on the GOES spacecraft.

Classification Peak Flux Range at 100-800 picometer
W/m2
A < 10e-7
B 10e-7 to 10e-6
C 10e-6 to 10e-5
M 10e-5 to 10e-4
X 10e-4 to 10e-3
Z > 10e-3

An earlier flare classification is based on Hα spectral observations. The scheme uses both the intensity and emitting surface. The classification in intensity is qualitative, referring to the flares as: (f)aint, (n)ormal or (b)rilliant. The emitting surface is measured in terms of millionths of the hemisphere and is described below. (The total hemisphere area AH = 6.2 × 1012 km2.)

Classification Corrected area
(millionths of hemisphere)
S < 100
1 100 - 250
2 250 - 600
3 600 - 1200
4 > 1200

Sunspot number

Sunspots

Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They correspond to concentrations of magnetic field that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere. Sunspots usually appear in pairs, with pair members of opposite magnetic polarity. The number of sunspots varies according to the approximately 11-year solar cycle.

Sunspot populations quickly rise and more slowly fall on an irregular cycle of 11 years, although significant variations in the number of sunspots attending the 11-year period are known over longer spans of time. For example, from 1900 to the 1960s, the solar maxima trend of sunspot count has been upward; from the 1960s to the present, it has diminished somewhat. Over the last decades the Sun has had a markedly high average level of sunspot activity; it was last similarly active over 8,000 years ago.

The number of sunspots correlates with the intensity of solar radiation over the period since 1979, when satellite measurements of absolute radiative flux became available. Since sunspots are darker than the surrounding photosphere it might be expected that more sunspots would lead to less solar radiation and a decreased solar constant. However, the surrounding margins of sunspots are brighter than the average, and so are hotter; overall, more sunspots increase the Sun's solar constant or brightness. The variation caused by the sunspot cycle to solar output is relatively small, on the order of 0.1% of the solar constant (a peak-to-trough range of 1.3 W/m2 compared to 1366 W/m2 for the average solar constant).

K-indices



Today


0h
UTC
3h
UTC
6h
UTC
9h
UTC
12h
UTC
15h
UTC
18h
UTC
21h
UTC
0. 67 2. 33 3.



Data


Estimated Planetary

Estimated Planetary

Date A K-indices (UTC)
0h 3h 6h 9h 12h 15h 18h 21h
2023-01-02 8 2. 67 1. 67 1.
2023-01-03 7 1. 67 0. 67 1.
2023-01-04 21 4. 00 4. 67 5.
2023-01-05 8 0. 33 1. 00 1.
2023-01-06 4 1. 67 0. 33 1.
2023-01-07 6 1. 33 2. 67 1.
2023-01-08 8 2. 33 2. 33 2.
2023-01-09 5 2. 00 0. 67 1.
2023-01-10 7 1. 00 0. 67 1.
2023-01-11 9 2. 00 2. 67 2.
2023-01-12 9 3. 00 1. 67 2.
2023-01-13 12 2. 67 2. 00 2.
2023-01-14 11 3. 67 3. 67 2.
2023-01-15 30 5. 00 4. 00 4.
2023-01-16 14 4. 00 1. 67 3.
2023-01-17 6 0. 67 1. 67 1.
2023-01-18 15 4. 00 4. 00 3.
2023-01-19 7 0. 33 1. 33 3.
2023-01-20 6 1. 00 1. 00 0.
2023-01-21 17 3. 00 4. 33 3.
2023-01-22 9 2. 00 1. 67 2.
2023-01-23 7 0. 67 2. 00 1.
2023-01-24 4 1. 33 0. 67 1.
2023-01-25 7 0. 67 0. 67 0.
2023-01-26 11 1. 67 3. 00 3.
2023-01-27 9 1. 00 0. 67 1.
2023-01-28 10 3. 33 2. 67 2.
2023-01-29 5 1. 00 0. 33 2.
2023-01-30 5 1. 67 0. 33 1.
2023-01-31 7 0. 67 2. 33 3.

Middle Latitude

Date A K-indices
2023-01-02 5 1 1 1 1 1 2 2 2
2023-01-03 5 1 0 1 1 1 2 2 3
2023-01-04 17 3 4 4 4 3 3 2 1
2023-01-05 6 0 1 1 1 3 2 2 2
2023-01-06 4 1 0 1 0 2 2 2 2
2023-01-07 5 0 2 1 1 1 3 2 1
2023-01-08 7 2 2 2 1 3 2 1 1
2023-01-09 7 1 1 1 1 2 2 4 1
2023-01-10 6 1 0 1 0 3 3 2 1
2023-01-11 8 1 2 2 2 2 3 2
2023-01-12 8 3 1 2 1 2 3 2 2
2023-01-13 10 2 1 2 2 2 3 2 4
2023-01-14 9 3 3 2 1 2 2 1 3
2023-01-15 17 4 3 3 3 3 3 3 3
2023-01-16 10 3 1 2 3 3 3 1 1
2023-01-17 5 0 1 1 1 2 1 1 3
2023-01-18 11 3 3 3 2 3 3 1 1
2023-01-19 6 0 2 2 2 3 2 1 1
2023-01-20 4 0 1 0 0 2 3 2 1
2023-01-21 11 2 3 3 2 3 2 3 2
2023-01-22 7 1 1 2 2 2 2 3 1
2023-01-23 5 0 2 0 0 3 2 1 2
2023-01-24 3 1 0 1 1 2 2 1 0
2023-01-25 5 0 1 0 2 3 2 2 1
2023-01-26 9 1 2 3 2 3 3 2 1
2023-01-27 6 0 0 2 2 2 3 2 2
2023-01-28 8 3 2 2 1 2 3 2 1
2023-01-29 5 1 0 2 1 2 2 2 1
2023-01-30 4 1 1 1 1 1 1 1 2
2023-01-31 1 2 2 2 1

High Latitude

Date A K-indices
2023-01-02 8 2 1 1 2 4 2 1 1
2023-01-03 4 0 0 2 2 1 2 2 1
2023-01-04 23 3 4 5 5 4 3 1 0
2023-01-05 14 0 0 1 1 5 5 2 1
2023-01-06 1 0 0 1 2 0 0 0 0
2023-01-07 2 0 1 0 0 0 2 2 0
2023-01-08 16 0 2 2 4 6 1 0 0
2023-01-09 3 0 0 0 3 1 2 0 0
2023-01-10 8 0 0 0 0 4 4 1 1
2023-01-11 8 2 1 2 3 3 2 2 1
2023-01-12 7 1 1 3 3 2 1 2 1
2023-01-13 18 1 1 4 5 4 1 3 3
2023-01-14 6 3 3 2 1 0 0 1 2
2023-01-15 53 3 3 6 7 5 4 5 5
2023-01-16 18 3 1 3 5 4 4 2 0
2023-01-17 3 0 1 0 1 2 0 0 2
2023-01-18 23 2 2 4 6 5 3 1 0
2023-01-19 12 0 1 4 3 5 0 0 0
2023-01-20 7 0 0 0 2 3 4 1 0
2023-01-21 17 1 3 4 3 4 3 4 1
2023-01-22 15 1 2 3 3 4 4 3 2
2023-01-23 12 0 1 0 0 5 4 2 2
2023-01-24 4 1 0 0 3 2 2 0 0
2023-01-25 20 0 0 0 4 5 6 2 0
2023-01-26 16 1 1 3 4 5 3 3 0
2023-01-27 16 0 0 2 5 4 4 3 2
2023-01-28 11 2 1 2 3 4 3 2 1
2023-01-29 3 1 0 1 1 2 2 0 0
2023-01-30 2 0 0 0 2 0 0 1 1
2023-01-31 1 1 3 3 2

About

The K-index quantifies disturbances in the horizontal component of earth's magnetic field with an integer in the range 0–9 with 1 being calm and 5 or more indicating a geomagnetic storm. It is derived from the maximum fluctuations of horizontal components observed on a magnetometer during a three-hour interval. The label K comes from the German word Kennziffer meaning “characteristic digit”. The K-index was introduced by Julius Bartels in 1938.

The Estimated 3-hour Planetary Kp-index is derived at the NOAA Space Weather Prediction Center using data from the following ground-based magnetometers:

  • Sitka, Alaska
  • Meanook, Canada
  • Ottawa, Canada
  • Fredericksburg, Virginia
  • Hartland, UK
  • Wingst, Germany
  • Niemegk, Germany
  • Canberra, Australia

These data are made available thanks to the cooperative efforts between SWPC and data providers around the world, which currently includes the U.S. Geological Survey, Natural Resources Canada (NRCAN), the British Geological Survey, the German Research Centre for Geosciences (GFZ), and Geoscience Australia. Important magnetometer observations are also contributed by the Institut de Physique du Globe de Paris and the Korean Space Weather Center K-index Watches are issued when the highest predicted NOAA estimated Kp-indices for a day are K = 5, 6, 7, or >= 8 and is reported in terms of the NOAA G scale. K-index Warnings are issued when NOAA estimated Kp-indices of 4, 5, 6, and 7 or greater are expected. K-index Alerts are issued when the NOAA estimated Kp-indices reach 4, 5, 6, 7, 8, or 9.


More info
Data source:

Units

Language