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National Oceanic and Atmospheric Administration

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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

G1 (Minor) Geomagnetic Storms Likely on 31 July and 01 August

Negative Polarity Coronal Hole High Speed Streams
G1 (Minor) Geomagnetic Storms Likely on 31 July and 01 August
published: Monday, August 03, 2015 14:22 UTC

A WATCH for G1 (Minor) geomagnetic storm conditions has been issued for 31 July and 01 August due to the anticipated onset of multiple recurrent negative polarity coronal hole high speed streams (CH HSS).