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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, April 21, 2025 23:03:36

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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 (Minor) Geomagnetic Storm Levels Observed

G1 (Minor) Geomagnetic Storm Levels Observed
published: Sunday, July 23, 2017 11:10 UTC

G1 (Minor) geomagnetic storm levels were observed at 11:42 UTC (07:42 ET) on 22 July due to activity associated with a coronal hole high speed stream.  A G1 (Minor) storm warning is in effect until 15:00 UTC on 22 July.