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National Oceanic and Atmospheric Administration

Friday, April 19, 2024 00:46:43

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NOAA Scales mini

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Space Weather Conditions
on NOAA Scales
24-Hour Observed Maximums
R
no data
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G
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Latest Observed
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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 --
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no data
R1-R2 --
R3-R5 --
S1 or greater --
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no data
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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

Coronal Hole Activity on 31 July-1 Aug, 2019

CH Analysis on 29 July, 2019
Coronal Hole Activity on 31 July-1 Aug, 2019
published: Friday, August 02, 2019 12:48 UTC

Several coronal holes (CH) are currently spread across the visible solar disk. Analysis indicates that the isolated, negative polarity CH identified as CH45- will likely connect with Earth later on Wednesday, 31 July, 2019 and result in unsettled to active levels of geomagnetic response. The CH high speed stream (HSS) associated enhancements in the solar wind are expected to continue into Thursday, 1 August, 2019. Late in the week, connections with the positive polarity CH HSS (CH47+ and CH48+) are expected and some elevated levels of geomagnetic response are likely. Keep checking our SWPC web page for the latest information and forecasts regarding these features.