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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Thursday, April 26, 2018 17:23:36

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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) Geomagnetic Storm WATCH Issued for 20-21 Sep 2015

WSA-ENLIL model output
G1 (Minor) Geomagnetic Storm WATCH Issued for 20-21 Sep 2015
published: Saturday, September 19, 2015 21:56 UTC

Isolated periods of minor geomagnetic storm conditions are likely on 20 Sep due to the influence of a positive polarity coronal hole high speed stream (CH HSS). G1 storms are likely again early on 21 Sep due to continued CH HSS influence in addition to the anticipated arrival of a CME from 18 Sep.