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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, September 15, 2025 03:26:00

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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

G3 (Strong) Geomagnetic Storm levels reached

G3 Strong storm Key messages and current aurora forecast image
G3 (Strong) Geomagnetic Storm levels reached
published: Monday, September 15, 2025 03:21 UTC

G3 (Strong) geomagnetic storm levels were reached at 15/0259 UTC (2259 EDT on 14 Sep) following the onset of increased solar winds from a coronal hole high speed stream. Stay tuned to our website for updates.