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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, October 26, 2020 15:43:03

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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
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
S
no data
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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

G1 (Minor) WATCH for 24-25 October, 2019

G1 (Minor) WATCH for 24-25 October, 2019
published: Friday, October 25, 2019 20:49 UTC

A G1 (Minor) Geomagnetic Storm WATCH is in effect for the 24-25 October, 2019 UTC-days. A recurrent, positive polarity coronal hole (CH) high speed stream (HSS), designated as CH75+, is anticipated to rotate into an Earth-connected position on 24 October. A co-rotating interaction region (CIR) is expected to precede the CH HSS and is forecast to arrive mid to late UTC-day on Thursday, 24 October. Effects from CIR arrival, coupled with CH HSS onset, are likely to cause geomagnetic responses to G1 storm levels. Elevated solar wind speed due to the CH HSS is forecast to continue into Friday, 25 October, and likely result in an additional early period of G1 storm levels. This CH HSS has been a persistent feature for a few rotations and has a history of causing geomagnetic storm conditions (31 August - 1 September, and again 27 - 28 September). SWPC forecasts are updated twice daily at 0030 UTC and 1230 UTC; continue to follow our latest forecast and discussion for the latest information.