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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Thursday, April 26, 2018 17:13:39

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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

G3 (Strong) or Greater Geomagnetic storms expected

ACE Spacecraft Solar Wind Measurements showing arrival of shock.
G3 (Strong) or Greater Geomagnetic storms expected
published: Friday, March 20, 2015 00:04 UTC

Strong (G3) geomagnetic storms or greater are expected as the impacts from todays shock continue.  The interplanetary shock arrived at the ACE spacecraft at 0405 UTC (12:05 a.m. EDT) and at Earth a half hour later.  These disturbed geomagnetic conditions are expected to continue for the next several hours.