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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Wednesday, February 21, 2018 21:30:22

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NOAA Scales mini

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Space Weather Conditions
24-Hour Observed Maximums
R
no data
S
no data
G
no data
Latest Observed
R
no data
S
no data
G
no data
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
G
no data
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 Watch for 15 February, 2018

G1 Watch for 15 February, 2018
G1 Watch for 15 February, 2018
published: Thursday, February 15, 2018 08:24 UTC

A G1 (Minor) geomagnetic storm watch is in effect for 15 February, 2018. The G1 Watch has been issued due to the likely response associated with the arrival of an asymmetric halo coronal mass ejection (CME) glancing blow late on the 14 February to early 15 February UTC-days. The CME was first observed in SOHO/LASCO-C2 imagery at 0125 UTC on 12 February (8:25 pm ET on 11 February). Current background solar wind speeds are slower than routine model predictions, so the forecast arrival timing of the CME has been slowed from the WSA-Enlil CME model run prediction. Continue to check our SWPC webpage for the latest forecasts, watches, warnings, and alerts.