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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Wednesday, April 17, 2024 15:08:39

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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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S
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G
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Latest Observed
R
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S
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R1-R2 --
R3-R5 --
S1 or greater --
G
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R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
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R
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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 storm conditions observed

Ovation Auroral oval forecast
G1-Minor storm conditions observed
published: Friday, November 20, 2015 04:35 UTC

G1 - Minor geomagnetic storm conditions were observed on 18 November as the anticipated coronal mass ejection (CME) from 16 November impacted the Earth's magnetosphere.  G1 - Minor conditions are expected to last into the early hours of 19 November (UTC), with a chance for G2 - Moderate levels very early in the period.  Appropriate Warnings and Alerts will be issued if conditions increase above the G-1 levels.

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