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National Oceanic and Atmospheric Administration

Saturday, April 19, 2025 11:23:27

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NOAA Scales mini

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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
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R
no data
S
no data
G
no data
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

R1 (Minor) Event on 4 Nov and subsequent Coronal Mass Ejection **UPDATE**

SDO/AIA imagery
R1 (Minor) Event on 4 Nov and subsequent Coronal Mass Ejection **UPDATE**
published: Saturday, November 07, 2015 04:43 UTC

An R1 (Minor Radio Blackout) event occurred due to an M3 X-ray flare on 04 Nov at 1352 UTC (04 Nov at 0852 EDT) as seen in this image from NASA's Solar Dynamics Observatory. The flare had associated radio sweep signatures often associated with a coronal mass ejection (CME). SWPC forecaster analysis of SOHO/LASCO coronagraph imagery concluded a partial halo CME did, in fact, occur with this event and is likely to have an Earth-directed component. ****UPDATE - A G1-Minor geomagnetic storm WATCH has been issued for 7 Nov.  The expected arrival of the CME is late on the 7th/early on the 8th of Nov (UTC).**** Please continue to check our website for any updated information regarding this event.