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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, April 18, 2025 20:40:09

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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

News Archive

Previous SWPC news items.

News Archive

Originally Posted
G2 (Moderate) Geomagnetic Storm in Progress as CME Effects Continue Thursday, December 31, 2015 - 14:05
Shock Arrival at ACE Thursday, December 31, 2015 - 01:49
Image depicting arrival of the 28 December CME from the ACE satellite. 28 December CME Arrived, G1 (Minor) Storming Now Expected Monday, December 28, 2015 - 22:20
SOHO/LASCO-C3 coronagraph images of 28 Dec CME Coronal Mass Ejection on 28 December Monday, December 28, 2015 - 20:09
R1 (Minor) Radio Blackout Event on 28 Dec R1 (Minor) Radio Blackout Event on 28 Dec Monday, December 28, 2015 - 13:52

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