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National Oceanic and Atmospheric Administration

Friday, September 12, 2025 16:15:38 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

G1 (Minor) Storm Warning in Effect

G1 (Minor) Storm Warning in Effect
published: Thursday, March 30, 2017 11:50 UTC

A G1 (Minor) storm warning is in effect from 30/0125 EDT (30/0525 UTC) - 30/0800 EDT (30/1200 UTC). G1 (Minor) storm levels are expected due to enhanced solar wind conditions. Continue to monitor the SWPC webpage for the latest information.