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National Oceanic and Atmospheric Administration

Thursday, June 26, 2025 18:10:23 UTC

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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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G1 (Minor) Geomagnetic Storming Observed

Ovation-Prime Model depiction of aurora oval
G1 (Minor) Geomagnetic Storming Observed
published: Tuesday, December 08, 2015 11:55 UTC

G1 (Minor) geomagnetic storm levels were observed at 11:59 UTC on 06 Dec (6:59 AM ET) due to activity from a coronal hole high speed stream.  A G1 Watch continues for the next two days (07-08 Dec) as conditions warrant.