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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Sunday, October 22, 2017 19:06:10

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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

G3 Watch: 7 through 9 September, 2017 due to CME Effects

G3 Watch for 7-9 September, 2017
G3 Watch: 7 through 9 September, 2017 due to CME Effects
published: Saturday, September 09, 2017 01:55 UTC

The G3 (Strong) geomagnetic storm watch for the 7 September UTC-day remains in effect due to coronal mass ejection (CME) arrival and effects from the 4 September CME. Additionally, a G3 Watch is now in effect for the 8 and 9 September UTC-days in anticipation of the arrival of another CME associated with the X9.3 flare (R3-Strong radio blackout) on 6 September at 1202 UTC (0802 ET). Analysis indicates likely CME arrival late on 8 September into early 9 September. Keep checking our SWPC website for updates to the forecast.