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National Oceanic and Atmospheric Administration

Wednesday, June 04, 2025 13:52:14 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

G4 (Severe) Geomagnetic Storm Levels Continue to be Observed

G4 (Severe) Geomagnetic Storm Levels Continue to be Observed
published: Friday, October 11, 2024 16:13 UTC

UPDATE! CME passage intensified; things are favorable for G4 (Severe) levels to potentially continue into night hours, with a chance for G5 (Extreme) levels. Keep space weather aware by visiting our webpage for the latest. We take actions to notify officials and critical infrastructure operators, so you can enjoy the beauty of the aurora.