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National Oceanic and Atmospheric Administration

Saturday, April 20, 2024 02:23:04

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NOAA Scales mini

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Space Weather Conditions
on NOAA Scales
24-Hour Observed Maximums
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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
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

R3-Strong Radio Blackout from Active Region 12339

SDO/AIA 335 Imagery of R3-Strong Radio Blackout
R3-Strong Radio Blackout from Active Region 12339
published: Monday, May 11, 2015 14:11 UTC
An impulsive R3-Strong radio blackout was observed shortly after 2200 UTC (1800 EDT) today (05 May 2015).  Given the impulsive nature of this event, as well as the source location on the eastern limb of the sun, we are not expecting a radiation storm at Earth.  We will be on the lookout for new imagery from the NASA SOHO mission to determine if there was an associated coronal mass ejection (CME) with this event.  Given the same logic above however, we do not expect there to be one that would impact Earth.
 
We are expecting several active regions to be rotating onto the visible disk later this week and into the weekend.  We have observed a few, energetic CMEs on the back side of the sun with these regions so we expect that overall solar activity will be on the rise in the short to medium term.  Stay tuned here for updates.