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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, December 05, 2016 04:23:17

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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

STORM Time Empirical Ionospheric Correction

The storm-time correction of the F-region critical frequency is primarily of benefit for high frequency (HF; 3-30 MHz) communication users.

The STORM model provides an estimate of the expected change in the ionosphere during periods of increased geomagnetic activity. The model estimates the departure from normal of the F-region critical frequency (foF2) every hour of the day for the current and previous day. The STORM model was developed from ionospheric observations during many storms that were analyzed as a function of season and latitude.