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National Oceanic and Atmospheric Administration

Wednesday, April 23, 2025 03:00:28

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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
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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

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After Action Report of the 2024 Space Weather Simulation Exercise
Geomagnetic Storm Continues
CME Passage Continues Today, 16 Apr 2025
After Action Report of the 2024 Space Weather Simulation Exercise
Thursday, April 17, 2025 14:06 UTC

The Johns Hopkins Applied Physics Laboratory released the results of the nation’s first end-to-end Space Weather Tabletop Exercise (TTX).

CME Passage of 16-17 April Continues
Thursday, April 17, 2025 13:34 UTC

CME passage continues today, 16 April, with a peak of G4 (Severe) levels reached.

G4 (Severe) Geomagnetic Storm Levels Observed
Wednesday, April 16, 2025 21:31 UTC

G4 (Severe) Geomagnetic Storm levels were observed at 16/2055 UTC due to activity associated with a pair of CMEs that left the Sun on 13 Apr.

CME Passage Continues Today, 16 Apr 2025
Wednesday, April 16, 2025 14:34 UTC

CME passage continues today, 16 Apr with G3 levels reached.

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GOES X-Ray Flux

GOES Proton Flux
Updated Time:
NOAA Scales Geomagnetic Storms
Kp < 5 Kp = 5 (G1) Kp = 6 (G2) Kp = 7 (G3) Kp = 8, 9- (G4) Kp = 9o (G5)