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National Oceanic and Atmospheric Administration

Saturday, April 20, 2024 02:03:47

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NOAA Scales mini

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Space Weather Conditions
on NOAA Scales
24-Hour Observed Maximums
R
no data
S
no data
G
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Latest Observed
R
no data
S
no data
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
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

Elevated Geomagnetic Field Activity Expected - 21-24 April 2017

Elevated Geomagnetic Field Activity Expected - 21-24 April 2017
published: Saturday, April 22, 2017 11:16 UTC

An enhancement in the near-earth solar wind environment caused periods of G1 (Minor) geomagnetic storm conditions between 21/1800-2359 UTC.  The solar wind is expected to become further enhanced due to the anticipated onset of a negative polarity coronal hole (high speed solar wind stream) which is expected to cause additional periods of G1 (Minor) storm levels on 22-24 April with G2 (Moderate) storm levels likely on 23 April.