Previous SWPC news items.
NOAA Scales mini
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
Navigation: Low-frequency navigation signals degraded for brief intervals.
News Archive
DAP - temp Head Section
News Archive
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Update: Geomagnetic Disturbance Weakening - 20 Sep 2015 | Sunday, September 20, 2015 - 14:10 |
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Update: R1 and R2 radio blackouts | Thursday, October 2, 2014 - 20:28 |
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UPDATE: S1 Solar Radiation Storm In Progress But Trending Down | Thursday, October 29, 2015 - 14:28 |
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Update: S1-S2 Warning Extended to 8 September/2359 UTC | Tuesday, September 5, 2017 - 15:10 |
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UPDATE: Service Change Notice for 45-Day Ap and F10.7 Forecast | Thursday, January 29, 2026 - 18:12 |