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National Oceanic and Atmospheric Administration

Tuesday, June 17, 2025 10:26:02 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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G1 Minor storm conditions reached

G1 Minor storm conditions met at 12/0500 UTC
G1 Minor storm conditions reached
published: Tuesday, July 12, 2016 17:49 UTC

G1-Minor geomagnetic storm conditions were reached at approximately 0100 EDT on 12 July (12/0500 UTC). The enhanced conditions were likely a result of the onset of a positive polarity coronal hole high speed stream (CH HSS).  Conditions are expected to last through 0500 EDT on 12 July (12/0900 UTC) as CH HSS influence persists.

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