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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, April 25, 2025 23:58:25

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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
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
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 Watch Issued for 11 Sep

G2 Watch - Auroral Prediction
G2 (Moderate) Geomagnetic Storm Watch Issued for 11 Sep
published: Tuesday, September 11, 2018 19:48 UTC

A G2 (Moderate) geomagnetic storm watch has been issued for 11 Sep 2018 due to the anticipated onset of coronal hole high speed stream.