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National Oceanic and Atmospheric Administration

Friday, November 22, 2024 20:20:21

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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
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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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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

G2 (Moderate) Storming Underway

G2 (Moderate) Storming Underway
published: Friday, September 12, 2014 23:36 UTC

The second of the expected coronal mass ejections (CMEs) has arrived, and arrived in good agreement with the predicted arrival times (shown here in this ACE solar wind plot as the strong discontinuity near the end of the graph).  As expected, an initial looks shows this CME is stronger than the first.  G2 (Moderate) storming is underway now and the forecast for G3 (Strong) storming on the 13th still looks reasonable.  The solar radiation storm that is in progress as a result of the eruption on September 10th peaked briefly, as it often does with the passage of the shock, but is currently below the S2 threshold and in decline.