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National Oceanic and Atmospheric Administration

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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

G2 (Moderate) Geomagnetic Storm Conditions Observed

G2 (Moderate) Geomagnetic Storm Conditions Observed
published: Wednesday, September 30, 2020 17:58 UTC

Due to the influence of a positive polarity coronal hole/high speed stream, G2 (Moderate) geomagnetic storm conditions were observed at 27/2359 UTC. Continued G2 storm conditions are expected early on 28 Sep and a G2 warning is valid until 28/0900 UTC.