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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, April 21, 2025 20:22:09

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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 Warning Issued/Conditions Observed G2 (Moderate) Geomagnetic Storm Warning Issued/Conditions Observed Thursday, September 14, 2017 - 21:24
G1 (Minor) Geomagnetic Storm Conditions Observed G1 (Minor) Geomagnetic Storm Conditions Observed Thursday, September 14, 2017 - 16:20
G1 (Minor) Geomagnetic Storm Warning Issued G1 (Minor) Geomagnetic Storm Warning Issued Thursday, September 14, 2017 - 14:59
G1-Minor Storm Watch Issued for 16 Sep Wednesday, September 13, 2017 - 22:03
S1 Warning/D-Rap model chart S1 Radiation Storm Warning extended Wednesday, September 13, 2017 - 21:54

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