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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, April 11, 2025 01:47:50 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

Observations



SWPC utilizes an array of observed data sets in their Space Weather forecast operations and related research.  Many of these data sets are available in near-real-time, and come from a variety of sources, ranging from solar imaging satellites to ground magnetometer stations.  SWPC also provides these data sources to the external community.