g Very low frequency pole

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g ijA g 3 Hz - 3 kHzdgB Very low frequency pole (small butterfly butterfly), the frequency of 3 Hz - 3 kHz is the radio. g 100000 km - 100 km B Wavelength is 100000 km - 100 km will be.

gpExtremely low frequency(ELF)ApELF3 Hz - 30 HzdgwA{gELF( Extremely low frequency , 3 - 30 Hz)ASLF( Super low frequency , 30 - 300 Hz)AULF( Ultra low frequency , 300 Hz - 3 kHz)B English for the very low frequency pole is Extremely low frequency (ELF) and be in the English-speaking ELF 3 Hz - 30 Hz and a signal point, the pole means very low frequency range of the Japanese in the ELF ( Extremely low frequency, 3 - 30 Hz), SLF (Super low frequency, 30 - 300 Hz), Ulf (Ultra low frequency, 300 Hz - 3 kHz) are included.

[ W ] M Communication

gnB Very low frequency pole will pass through the earth and water. ARATSMigpB Therefore, by the military, was used as a means of secure communication is not intercepted by others. A zRMAMpB Currently, other communications in the mine, which is used to communicate with submarines.

[ W ] nk Earthquake

A nkOgXpCNMB Some observation stations, reported that the observed spike-like signal of very low frequency pole in front of the earthquake. A 1989NJtHjAB}EvG^nkB For example, the 1989 earthquake and PURIETA Roma have occurred in California in the year. nkxVXepAnkgWB As early warning systems available to this earthquake is very low frequency and study the relationship between earthquakes and extreme.

u g vA HwEZpAB This "long-pole", is the item on writing a technology engineering. MA B Touch, we asked participants toSARU and Correction.