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National Oceanic and Atmospheric Administration

Sunday, May 25, 2025 17:03:25 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

G2 Moderate Storm levels reached on 19 Sep

G2 Moderate Storm levels Reached. Aurora forecast plot.
G2 Moderate Storm levels reached on 19 Sep
published: Wednesday, September 20, 2023 00:58 UTC

G2 (Moderate) geomagnetic storm levels were reached at 19/0216 UTC (18/2016 MDT) following the likely arrival of the anticipated coronal mass ejection that left the Sun on 16 Sep.

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