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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Wednesday, July 23, 2025 03:54:49

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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 Warning Issued/Conditions Observed

G2 (Moderate) Geomagnetic Storm Warning Issued/Conditions Observed
G2 (Moderate) Geomagnetic Storm Warning Issued/Conditions Observed
published: Friday, September 15, 2017 03:39 UTC

A G2 (Moderate) geomagnetic storm warning was issued at 14/1555 UTC as a result of anticipated effects from a positive polarity CH HSS. G2 geomagnetic storm levels were observed at 14/1759 UTC. The G2 warning remains in effect until 15/0300 UTC.