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National Oceanic and Atmospheric Administration

Thursday, September 04, 2025 11:33:47

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Space Weather Conditions
on NOAA Scales
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 --
G
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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
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

CME Arrival at Earth Occurred about 5pm EDT on Sep 1, 2025

CME Arrival at Earth!
CME Arrival at Earth Occurred about 5pm EDT on Sep 1, 2025
published: Thursday, September 04, 2025 07:52 UTC

The CME arrived near 4:30pm EDT on 1 Sep, 2025, at the L1 orbital point - 1 million miles from Earth. It arrived at Earth very near 5:00pm EDT as noted by the GOES satellites’ magnetometers. Warnings will be issued as appropriate - so stay informed by visiting our SWPC webpage.