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Real-time world map region portion absorbtion. Index Black is for nothing and Red or Violet is for suffering.

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  • Radio Blackout - Disturbances of the ionosphere causeda by X-ray emissions from the Sun. When moderate to strong solar flares take place, certain frequency ranges in the HF spectrum may be degraded while a flare is in progress on the sunlit side of the earth.
    Radio Blackout Class

    R5 - Extreme
    R4 - Severe
    R3 - Strong
    R2 - Moderate
    R1 - Minor

    Detailed Radio Blackout Class information and effects can be found here http://www.swpc.noaa.gov/NOAAscales/#RadioBlackouts

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