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Tuesday, June 17, 2025 20:09:05 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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Severe (G4) Geomagnetic Storms Observed - 12 Aug 2024

Severe (G4) Geomagnetic Storms Observed - 12 Aug 2024
published: Tuesday, August 13, 2024 14:00 UTC

G4 (Severe) geomagnetic storming was observed at approximately 1442 UTC on 12 Aug in response to a coronal mass ejection passing by Earth. The current G3 Warning (Strong or greater) is valid until 12/1800 UTC.