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National Oceanic and Atmospheric Administration

Tuesday, May 20, 2025 17:33:32 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

G3 Watch for 16 Apr 2025

G3 Watch for 16 Apr 2025
published: Thursday, April 17, 2025 00:43 UTC

A G3 (Strong) geomagnetic storm Watch has been issued for 16 Apr 2025 due to the arrival of multiple coronal mass ejections that left the Sun on 13 Apr. G1 (Minor) geomagnetic storming conditions likely to persist into 17 Apr.