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National Oceanic and Atmospheric Administration

Sunday, April 06, 2025 01:58:30 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

Solar Indices and Event Lists Page Has Changed

As part of the Space Weather Prediction Center's rollout of our improved website, the content from the Solar Indices and Event Lists page is being provided in a new way.

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