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National Oceanic and Atmospheric Administration

Monday, June 30, 2025 13:41:37 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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Update: G1 (Minor) Geomagnetic Storms Continue

Update: G1 (Minor) Geomagnetic Storms Continue
published: Sunday, August 20, 2017 21:09 UTC

Update:  G1 (Minor) geomagnetic storm levels have been observed for the fourth straight day due to effects from a recurrent, polar connected coronal hole high speed stream. The G1 Geomagnetic Storm Warning has been extended through August 19th at 11:00 am ET (20/1500 UTC). Stay tuned for updates!