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Thursday, July 31, 2025 13:23:27 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) Geomagnetic Storm Warning in effect through 17/0900 UTC

G1 (Minor) Geomagnetic Storm Warning in effect through 17/0900 UTC
published: Sunday, September 17, 2017 21:27 UTC

The G1 (Minor) Geomagnetic Storm Warning, in effect since 14/1445 UTC, has been extended through 17/0900 UTC as persistent effects from the positive polarity coronal hole high speed stream continue.