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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, May 02, 2025 17:44:58 UTC

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NOAA Scales

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Space Weather Conditions
on NOAA Scales
24-Hour Observed Maximums
R
no data
S
no data
G
no data
Latest Observed
R
no data
S
no data
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
1
2
3
PrevNext
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R
no data
S
no data
G
no data
Current Space Weather Conditions
on NOAA Scales
R1 (Minor) Radio Blackout Impacts
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HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales

Space Weather Summary

  • Solar Wind Speed: km/sec
  • Solar Wind Magnetic Fields: Bt nT, Bz nT
  • Noon 10.7cm Radio Flux: sfu

Slider

SWPC Testbed for Artemis II Support
After Action Report of the 2024 Space Weather Simulation Exercise

Serving Essential Space Weather Communities

The Sun (EUV)

Solar Ultraviolet Image 195 Å (Angstrom)

The Aurora

Aurora ovation plot

Coronal Mass Ejections

CCOR-1 Coronagraph Image

GOES X-Ray Flux

Created with Highcharts 8.0.4SWPC Warning ThresholdABCMXChart context menuLoadingData...Zoom6 Hour1 Day3 Day7 Day

GOES Proton Flux

Created with Highcharts 8.0.4SWPC 10 MeV Warning ThresholdChart context menuLoading Data...Zoom6 Hour1 Day3 Day7 Day
Updated Time:
NOAA Scales Geomagnetic Storms
Kp < 5 Kp = 5 (G1) Kp = 6 (G2) Kp = 7 (G3) Kp = 8, 9- (G4) Kp = 9o (G5)