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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, December 01, 2025 22:30:32

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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 03-04 Dec

G2 (Moderate) Geomagnetic Storm Watch Issued for 03-04 Dec
published: Monday, December 01, 2025 21:46 UTC

A coronal mass ejection (CME) was observed on 01 Dec associated with an X1.9 at 01/0249 UTC from Region 4299. Although most of the ejecta was east of the Sun/Earth line, a glancing blow is likely. There is some uncertainty with the timing of the event, so a G2 (Moderate) geomagnetic storm watch has been issued for 03-04 Dec (UTC day).

DAP - temp Head Section