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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, July 11, 2025 15:16:12

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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

G1 (Minor) Geomagnetic Storm Warning in effect through 17/0900 UTC

G1 (Minor) Geomagnetic Storm Warning in effect through 17/0900 UTC
published: Sunday, September 17, 2017 21:27 UTC

The G1 (Minor) Geomagnetic Storm Warning, in effect since 14/1445 UTC, has been extended through 17/0900 UTC as persistent effects from the positive polarity coronal hole high speed stream continue.