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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Thursday, November 23, 2017 18:33:28

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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

G1 (Minor) - G2 (Moderate) Geomagnetic Storms Likely on 18-19 December

G1 (Minor) - G2 (Moderate) Geomagnetic Storms Likely on 18-19 December
published: Sunday, December 20, 2015 14:04 UTC

G1 (Minor) and G2 (Moderate) Geomagnetic Storm Watches have been issued for 18 and 19 December respectively in anticipation of the arrival of the two CMEs observed on 16 December. The first CME is expected to arrive late on 18 December bringing G1 (Minor) geomagnetic storm conditions with it, followed in close succession by the second CME early on 19 December, likely increasing activity to G2 (Moderate) levels. Stay tuned to our website for updates!