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National Oceanic and Atmospheric Administration

Saturday, November 23, 2024 16:30:52

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NOAA Scales mini

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Space Weather Conditions
on NOAA Scales
24-Hour Observed Maximums
R
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G
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Latest Observed
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R1-R2 --
R3-R5 --
S1 or greater --
G
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R1-R2 --
R3-R5 --
S1 or greater --
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no data
R1-R2 --
R3-R5 --
S1 or greater --
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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

Update: Geomagnetic Disturbance Weakening - 20 Sep 2015

ACE - Real-Time Solar Wind
Update: Geomagnetic Disturbance Weakening - 20 Sep 2015
published: Wednesday, September 23, 2015 13:59 UTC

An isolated period of G3 (Strong) geomagnetic storms were observed between 20/0600-0900 UTC (20/0200-0500 EDT) due to the influence of a coronal hole high speed stream and the arrival of a coronal mass ejection from 18 Sep.  The effects of the coronal mass ejection have subsided although weak coronal hole influence is still being observed.  G1 (Minor) geomagnetic storms are expected until around 20/1800 UTC (20/1400 EDT) as this event continues to wane.