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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, December 15, 2017 02:41:33

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NOAA Scales mini

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Space Weather Conditions
24-Hour Observed Maximums
R
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S
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G
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Latest Observed
R
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S
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G
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R1-R2 --
R3-R5 --
S1 or greater --
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
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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

G2 Warning Valid through 5/2100 UTC (5/1600 ET)

G2 Warning
G2 Warning Valid through 5/2100 UTC (5/1600 ET)
published: Tuesday, December 05, 2017 21:11 UTC

A G2 (Moderate) geomagnetic storm warning is now in effect today (5 December) until 2100 UTC (1600 ET). Solar wind speed was around 550 km/s as of 5/1400 UTC (0900 ET) and total interplanetary magnetic field (IMF) strength remains elevated due to influences from the positive polarity, polar connected coronal hole high speed stream (CH HSS). G1 (Minor) storming has already been met today at 1017 UTC (0517 ET) and again at 1407 UTC (0907 ET). Continue to visit our SWPC webpage for the latest updates.