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National Oceanic and Atmospheric Administration

Monday, May 20, 2024 22:30:46

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NOAA Scales mini

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

Severe and Extreme (G4-G5) Geomagnetic Storms Likely on 12 May 2024

Severe and Extreme (G4-G5) Geomagnetic Storms Likely on 12 May 2024
published: Monday, May 13, 2024 12:25 UTC

Another series of CMEs associated with flare activity from Region 3664 over the past several days are expected to merge and arrive at Earth by midday (UTC) on 12 May. Periods of G4-G5 (Severe-Extreme) geomagnetic storms are likely to follow the arrival of these CMEs.