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National Oceanic and Atmospheric Administration

Friday, April 04, 2025 09:42:04 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.
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News Archive

Previous SWPC news items.

News Archive

Originally Posted
A coronal hole is now in a geoeffective position and G1-Minor geomagnetic storms commenced at 1935 UTC (3:35pm ET) on this 4th of July G1-Minor Geomagnetic Storms In Progress Saturday, July 4, 2015 - 20:20
CME passage depicted in shaded area Anticipated CME Passes Quietly By The Earth Sunday, June 28, 2015 - 14:50
The Sun produces yet another Earth-directed event Thursday, June 25, 2015 - 18:28
Yet another R2 flare from NOAA Region 12371 Thursday, June 25, 2015 - 13:46
24 June ACE plot G3 downgraded to G1 Wednesday, June 24, 2015 - 22:08

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