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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Saturday, October 23, 2021 03:43:55

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NOAA Scales mini

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Space Weather Conditions
24-Hour Observed Maximums
R
no data
S
no data
G
no data
Latest Observed
R
no data
S
no data
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
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
no data
S
no data
G
no data
Current Space Weather Conditions
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) Radio Blackout Observed

R3 (Strong) Radio Blackout Observed
published: Monday, July 05, 2021 20:52 UTC

New Region 2838 produced an impulsive X1 flare (R3 - Strong Radio Blackout) at 14:29 UTC on 03 July. This sunspot region developed overnight and was also responsible for an M2 flare (R1 - Minor Radio Blackout) at 07:17 UTC on 03 July.