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National Oceanic and Atmospheric Administration

Tuesday, April 01, 2025 07:10:49 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

Geomagnetic Indices Lists and Plots Page Has Changed

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

Try the following page:

Geomagnetic Indices Lists and Plots