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National Oceanic and Atmospheric Administration

Friday, December 20, 2024 22:25:47

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NOAA Scales mini

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Space Weather Conditions
on NOAA Scales
24-Hour Observed Maximums
R
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S
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G
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Latest Observed
R
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S
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G
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R1-R2 --
R3-R5 --
S1 or greater --
G
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R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
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R
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Current Space Weather Conditions
on NOAA Scales
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

R3 (Strong) HF Radio Blackout 1:50pm EST from X1.9 Flare

R3 (Strong) HF Radio Blackout 1:50pm EST from X1.9 Flare
published: Thursday, January 12, 2023 15:50 UTC

Spot complex Region 3184 produced an impulsive X1.9 flare (R3-Strong HF Radio Blackout) at 1:50pm EST (1850 UTC) on 9 January, 2023. This region was also the likely source of an X1.2 (R3) flare on 5 January from the southeast solar limb; and since rotating onto the visible solar disk, this region has also been the source of occasional M-class (R1; Minor) solar flares. Impulsive flares that reach the R3 levels can result in short-term HF radio frequency blackouts centered at the subsolar point during flare maximum. Continue visiting our SWPC webpage for the latest information and updates.