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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, May 30, 2025 15:50:52 UTC

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NOAA Scales mini

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

Federal Agencies

National Space Weather Program (NSWP)

Air Force 557th Weather Wing

National Aeronautical and Space Administration (NASA) Heliophysics

National Oceanic and Atmospheric Administration (NOAA)

National Science Foundation (NSF)

United States Geologic Survey (USGS)