Ultra low frequency

From Biocrawler, the free encyclopedia.

Ultra Low Frequency (ULF) is the frequency range between 300 Hertz and 3000 Hertz. There are no manmade communications transmitters in this frequency range.

See also

• Voice frequency

Radio spectrum ELF | SLF | ULF/VF | VLF | LF/LW | MF/MW | HF/SW | VHF | UHF | SHF | EHF 3 Hz | 30 Hz | 300 Hz | 3 kHz | 30 kHz | 300 kHz | 3 MHz | 30 MHz | 300 MHz | 3 GHz | 30 GHz | 300 GHz

fr:Ultra basse fréquence

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Earthquakes

Ultra Low Frequency (ULF) waves are electro-magnetic waves that might consistently appear before earthquakes. Especially in California many groups are trying to devise an early-warning system using the occurrence of ULF and ELF (extremely low frequency) waves to foretell when and where an earthquake will happen.

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Ultra_low_frequency (http://en.wikipedia.org/wiki/Ultra_low_frequency) version history (http://en.wikipedia.org/w/index.php?title=Ultra_low_frequency&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

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