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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Thursday, July 24, 2025 08:31:09 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.
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News Archive

Previous SWPC news items.

News Archive

Originally Posted
G4 (Severe) Geomagnetic Storming Observed Tuesday, September 17, 2024 - 03:54
Strong (G3) Geomagnetic Storms are Likely on 16 September 2024 Saturday, September 14, 2024 - 21:18
R3 Strong radio blackout/GOES SUVI imagery/Explanations R3 (Strong) HF Radio Blackout Event on 14 Sep 2024 Saturday, September 14, 2024 - 16:27
G3 - Strong Geomagnetic Storm Levels Observed G3 - Strong Geomagnetic Storm Levels Observed Thursday, September 12, 2024 - 14:59
R3 (Strong) HF Radio Blackout Observed Thursday, September 12, 2024 - 10:27

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