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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Sunday, March 30, 2025 22:39:01

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NOAA Scales mini

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Space Weather Conditions
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24-Hour Observed Maximums
R
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G
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Latest Observed
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R1-R2 --
R3-R5 --
S1 or greater --
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R1-R2 --
R3-R5 --
S1 or greater --
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no data
R1-R2 --
R3-R5 --
S1 or greater --
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no data
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R
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Current Space Weather Conditions
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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

G3 (Strong) Geomagnetic Storms Observed on 10 Apr 22

Solar Wind Measurements from the DSCOVR Spacecraft
G3 (Strong) Geomagnetic Storms Observed on 10 Apr 22
published: Monday, April 11, 2022 22:15 UTC

G3 (Strong) Geomagnetic Storms were observed at 10/0510 UTC (1:10am EDT) due to combined influence from a coronal mass ejection (CME) and a negative-polarity coronal hole. The interplanetary magnetic field increased to 19 nT and several hours of sustained negative Bz were recorded. G1 (Minor) Geomagnetic Storms were observed at 10/0740 UTC (3:40am EDT) as the total field decreased to 10 nT. There is a G1 (Minor) Geomagnetic Storm Warning in effect until 10/1500 UTC (11am EDT).