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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Saturday, November 23, 2024 12:18:17

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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
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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

G1 (Minor) Geomagnetic Storms Observed - 18 Oct 2015

G1 (Minor) Geomagnetic Storms Observed - 18 Oct 2015
published: Wednesday, October 21, 2015 06:30 UTC

A magnetic disturbance caused G1 (Minor) geomagnetic storms between 0900-1200 UTC (0500-0800 EDT) on 18 October 2015.  This disturbance is believed to have been caused by a change in the solar sector followed by a prolonged period of southward Bz.  G1 (Minor) geomagnetic storms are expected to persist until 18/1300 UTC (0900 UTC).