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National Oceanic and Atmospheric Administration

Friday, November 24, 2017 13:15:43

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NOAA Scales mini

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Space Weather Conditions
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
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

UPDATED - R2 (Moderate) Radio Blackout

UPDATED - R2 (Moderate) Radio Blackout
published: Wednesday, January 21, 2015 16:14 UTC

NOAA Active Region AR12257 produced a R2 (Moderate) solar flare radio blackout at 1124 pm (EST) on 12 January 2015 (the bright region on the far right of this NASA SDO image).  Effects from this event included limited blackout of high frequency (HF) radio communication on the sunlit side of the Earth lasting for tens of minutes. The event was followed quickly by another radio blackout event, an R1 (Minor) event, from the same region.  LASCO coronagraph imagery did not show a coronal mass ejection associated with this event, and even if there had been one, the location of the eruption would have likely sent that CME well away from Earth.  This region should be rotating out of view in the next couple of days.  Meanwhile, the rest of the active regions on the visible disk remain relatively small and inactive.