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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, December 20, 2024 23:52:19

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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

G4 (Severe) Storm Watch for 10-11 October

G4 Geomagnetic Storm Watch with coronagraph image
G4 (Severe) Storm Watch for 10-11 October
published: Friday, October 11, 2024 16:15 UTC

A fast coronal mass ejection (CME) erupted from the Sun the evening of 8 October, 2024, and is likely to arrive at Earth on 10 October. This CME has been analyzed and speed estimates are 1200 to 1300 km/s. This makes for a potential arrival time as early as the morning to midday of 10 October EDT. There is potential to reach G4 (Severe) upon arrival of this CME and throughout its passage. We won’t know the characteristics of the CME until it arrives 1 million miles from Earth and its speed and magnetic intensity are measured by the DSCOVR and ACE satellites. Please visit our webpage for the latest information and updates.