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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, September 25, 2017 09:39:56

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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 Watch for 20 May

Image depicting where aurora is likely to be observed
G1 Watch for 20 May
published: Sunday, May 21, 2017 02:43 UTC

A G1 Geomagnetic Storm Watch is valid for 20 May due to coronal hole high speed stream (CH HSS) effects. Solar wind speeds enhancements have been observed and G1 storm levels are expected to follow periods of extended southward Bz in the interplanetary magnetic field. A higher likelihood of visible aurora exists at high latitudes in the night sector while higher wind speeds persist.