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National Oceanic and Atmospheric Administration

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NOAA Scales mini

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Space Weather Conditions
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24-Hour Observed Maximums
R
no data
S
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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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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

C4 Flare on 20 March at 1118 UTC (0718 EDT)

C4 Flare 20 March
C4 Flare on 20 March at 1118 UTC (0718 EDT)
published: Friday, March 22, 2019 22:00 UTC

A C4 flare occurred today, 20 March at 1118 UTC (0718 EDT). The flare erupted from a recently emerged sunspot group (Region 2736). Although SWPC forecasters are awaiting observations from the SOHO/LASCO coronagraph, early indications from other satellite platforms, to include STEREO-A coronagraph imagery, suggest a Coronal Mass Ejection (CME) was likely associated with the C4 flare. Once the SOHO/LASCO imagery becomes available, we will conduct analysis to confirm if there was any notable CME, and if so - determine if there is any Earth-directed component. Keep checking our SWPC webpage for additional information as it becomes available.