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National Oceanic and Atmospheric Administration

Monday, February 10, 2025 13:21:39

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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
no data
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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) Radio Blackout Observed with X1.6 Flare on 05 Aug

R3 (Strong) Radio Blackout Observed with X1.6 Flare on 05 Aug
published: Monday, August 07, 2023 11:17 UTC

An X1.6 flare was observed from Region 3386 on 05 Aug. This flare lasted 59 minutes, peaking at 05/2221 UTC. Temporary or complete loss of High Frequency radio signals on the sunlit side of the Earth were possible during this event. A partial halo CME was associated with this flare. Analysis of this CME is ongoing, but preliminary results indicate an Earth-directed component, with the bulk of the plasma directed ahead of Earth’s orbit. Updates will be made available at 07/0030 UTC in our next Forecast Discussion | NOAA / NWS Space Weather Prediction Center.