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National Oceanic and Atmospheric Administration

Monday, March 31, 2025 21:47:10

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NOAA Scales mini

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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
R
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S
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R1-R2 --
R3-R5 --
S1 or greater --
G
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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
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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

R1 Flare and Associated CME Departure Early on 25 Feb

R1 Flare and Associated CME departure early on 25 Feb
R1 Flare and Associated CME Departure Early on 25 Feb
published: Thursday, February 27, 2025 14:16 UTC

An M3.6 solar flare (R1; Minor) occurred early on 25 February at 6:59 am EST (1159 UTC) from the southwest quadrant of the Sun's visible disk. The source of the solar flare was NOAA/SWPC Region 3998, a moderately complex sunspot group. The R1 event degraded some high frequency (HF) communication bands mainly over the sunlit side of Earth at the time of the flare - which was mainly the eastern Atlantic Ocean and Africa regions. The flare was associated with a coronal mass ejection (CME) as observed in SOHO/LASCO coronagraph imagery. The CME is currently under analysis for determination of any Earth-directed component. Stay informed with the Nation's official source of space weather information.