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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, December 20, 2024 21:55:51

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NOAA Scales mini

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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

R3 (Strong) HF Radio Blackout Event on 14 Sep 2024

R3 Strong radio blackout/GOES SUVI imagery/Explanations
R3 (Strong) HF Radio Blackout Event on 14 Sep 2024
published: Tuesday, September 17, 2024 03:55 UTC

An X4.5 flare occurred at approximately 14/1529 UTC, resulting in R3 (Strong) HF radio blackouts. Continue to monitor our web page for updated forecasts, alerts, and warnings.