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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Tuesday, June 17, 2025 12:40:01

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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

R2 Moderate solar flare

R2 Moderate (M8.4 X-ray flare) solar event
R2 Moderate solar flare
published: Tuesday, June 17, 2025 10:20 UTC

Active Region 4114 produced an M8.4 solar flare (R2-Moderate radio blackout) that peaked at approximately 15/1800 UTC. Initial indications point towards a likely CME associated with this eruption. Forecasters will analyze coronagraph imagery as it becomes available to determine if an Earth-directed component is present, along with potential arrival time and impacts. Stay tuned to our website for updates!