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National Oceanic and Atmospheric Administration

Friday, March 01, 2024 04:44:58

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NOAA Scales mini

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Space Weather Conditions
24-Hour Observed Maximums
R
no data
S
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G
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Latest Observed
R
no data
S
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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
S
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Current Space Weather Conditions
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

R2 (Moderate) HF Radio Blackout Event on 28 November, 2023

R2 Event on 28 November, 2023
R2 (Moderate) HF Radio Blackout Event on 28 November, 2023
published: Saturday, December 02, 2023 21:10 UTC

A R2 (Moderate) HF Radio Blackout Event occurred on 28 November, 2023 at 1950 UTC. The responsible flare peaked at M9.8 at 2:50 pm EST on 28 Nov as measured by the GOES-18 satellite. The flare source was NOAA/SWPC Region 3500 - a moderately complex sunspot group near the Sun’s central meridian. HF degradation was possible over the much of the eastern portion of the southern Pacific Ocean while the flare was in progress and above M5 levels. The flare was also associated with a probable coronal mass ejection (CME) as indicated by USAF solar and radio telescope observatory reports and also as suggested in GOES SUVI imagery. SWPC forecasters will examine coronagraph imagery as observations become available for CME signatures and analyze accordingly. Due to this recent activity and instability of Region 3500, the chances for further M-class flares has increased and there is now a slight chance for X-class flares. Stay informed by continuing to visit our webpage for the latest information, forecasts, and updates.