Concept information
Preferred term
extremely low frequency
Definition(s)
- Extremely low frequency (ELF) is the ITU designation for electromagnetic radiation (radio waves) with frequencies from 3 to 30 Hz, and corresponding wavelengths of 100,000 to 10,000 kilometers, respectively. In atmospheric science, an alternative definition is usually given, from 3 Hz to 3 kHz. In the related magnetosphere science, the lower frequency electromagnetic oscillations (pulsations occurring below ~3 Hz) are considered to lie in the ULF range, which is thus also defined differently from the ITU radio bands. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Extremely_low_frequency)
Broader concept(s)
Synonym(s)
- ELF
In other languages
-
French
-
EBF
-
rayonnement EBF
URI
http://data.loterre.fr/ark:/67375/MDL-JM40JDW5-W
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