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National Oceanic and Atmospheric Administration

Tuesday, May 13, 2025 15:21:12 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) Geomagnetic Storm Watch Issued for 24-26 April

G1 (Minor) Geomagnetic Storm Watch Issued for 24-26 April
published: Wednesday, April 26, 2017 22:58 UTC

A G1 (Minor) geomagnetic storm watch remains in effect for 24-26 April 2017 due to continued influence from a large, recurrent, negative-polarity coronal hole high speed stream (CH HSS). Stay tuned for continued updates.