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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Wednesday, August 27, 2025 02:18:59

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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-G2 (Minor-Moderate) Watch Issued for 08-09 Aug 2025

G1-G2 (Minor-Moderate) Watch Issued for 08-09 Aug 2025
published: Sunday, August 10, 2025 17:57 UTC

Combined effects from a coronal mass ejection (CME) which lifted off the Sun on 05 Aug and a coronal hole high speed stream (CH HSS) are expected to cause geomagnetic storming on 08-09 Aug. A G2 (Moderate) watch was issued for 08 Aug with the onset of activity. A G1 (Minor) watch was issued for 09 Aug.