NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, November 22, 2024 20:46:56

Main menu

NOAA Scales mini

minimize icon
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
maximize icon
R
no data
S
no data
G
no data
Current Space Weather Conditions
on NOAA Scales
R1 (Minor) Radio Blackout Impacts
close
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

Right on time…

Right on time…
published: Friday, September 12, 2014 18:05 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.  More to come as this event plays out but the forecast for G2 (Moderate) storming for September 12th and G3 (Strong) storming on the 13th still looks to be reasonable.  The solar radiation storm that is in progress as a result of the eruption on September 10th has increased with the passage of this shock, as it often does, and we currently sit just above the S2 (Moderate) threshold.