Short Wave Fade (SWF)

What is Short Wave Fade (SWF)?

Short Wave Fade (SWF) meaning In solar-terrestrial terms, a particular ionospheric solar flare effect under the broad category of sudden ionospheric disturbances (SIDs) whereby short-wavelength radio transmissions, VLF, through HF, are absorbed for a period of minutes to hours.

 

reference: National Weather Service Glossary