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National Oceanic and Atmospheric Administration

Monday, April 28, 2025 16:43:50 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.
More about the NOAA Space Weather Scales

The return of the X-flares

R3 Event 11 Feb, 2023
The return of the X-flares
published: Wednesday, February 15, 2023 18:49 UTC

Active Region 3217 produced an R3 radio blackout

(i.e. X1.1 flare) which peaked at 1548 UTC or 10:48am EST.

More flares are expected from this region as it moves across the sun creating occasional degradation of high frequency (3-30 MHz) communication.

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