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National Oceanic and Atmospheric Administration

Tuesday, April 24, 2018 21:25:41

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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

R1 (Minor) Radio Blackout Event on 28 Dec

R1 (Minor) Radio Blackout Event on 28 Dec
R1 (Minor) Radio Blackout Event on 28 Dec
published: Friday, January 01, 2016 16:22 UTC

An M1 flare (R1-Minor radio blackout) occurred on 28 Dec from Region 2473. The long-duration flare began at about 28/1120 UTC (0620 ET), peaked at 18/1245 UTC (0745 ET) and ended at 28/1409 UTC (0909 ET). Initial analysis of available GOES/SXI and NASA's Solar Dynamics Observatory (SDO) imagery, indicated a coronal mass ejection (CME) may have occurred in association with this flare. Additionally, a Type IV Radio Sweep was detected and is also indicative of a possible CME. SWPC forecasters will continue to analyze other imagery as it becomes available, and await updated coronagraph imagery, in order to confirm whether a CME did occur in relation to this event.