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National Oceanic and Atmospheric Administration

Wednesday, April 09, 2025 17:41:50 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

R3 (Strong) Radio Blackout Event

R3 (Strong) Radio Blackout Event
published: Friday, November 01, 2024 14:45 UTC

An X2.0 flare (R3-Strong) occurred at 21:20 UTC on 31 October from Region 3878.