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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Tuesday, April 29, 2025 19:52:09

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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

S1 (Minor) Solar Radiation Storm Event Began 13 March, 2023

S1 Event Began on 13 March, 2023
S1 (Minor) Solar Radiation Storm Event Began 13 March, 2023
published: Wednesday, March 15, 2023 14:35 UTC

A Minor (S1) Solar Radiation Storm began on 13 March, 2023. The S1 threshold was first reached at 3:45 am EDT (13/0745 UTC) on 13 March. This event was most likely associated with a CME from the far side of the Sun prior to the S1 storm onset. A warning remains active through 14 March and continuing periods of S1 levels are still possible on 15 March based on current trends and activity expectations. Continue to stay informed with the latest forecasts and updates by frequenting our website.