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National Oceanic and Atmospheric Administration

Monday, April 21, 2025 21:55:50

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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
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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
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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

G3 (Strong) Geomagnetic Storm Conditions Reached with CME Arrival

G3 Conditions met 3 Nov at 2359Z
G3 (Strong) Geomagnetic Storm Conditions Reached with CME Arrival
published: Friday, November 05, 2021 01:56 UTC

Anticipated CME arrival was detected at the NOAA DSCOVR spacecraft on 03 November, 2021, as an interplanetary shock at 03/1942 UTC (3 Nov/11:42pm EDT). This was followed by CME arrival at Earth as a sudden impulse by the GOES-16 satellite and ground-based magnetometers at 03/1957 UTC (3 Nov/11:57pm EDT). Geomagnetic response quickly escalated and reached G3 (Strong) storm levels by 03/2359 UTC (3 Nov/03:59am). This was preceded by G1 (Minor) and G2 (Moderate) storm levels at 03/2124 and 03/2146 UTC. CME passage continues and the G2 Watch and appropriate Warnings remain in place. Please visit our webpage at https://www.swpc.noaa.gov for the latest information and updates.