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AUDIOFREQUENCY MAGNETIC FIELD [1 record]
Record 1 - internal organization data 2004-09-29
Record 1, English
Record 1, Subject field(s)
- Magnetic and Electromagnetic Prospecting
- Geological Research and Exploration
- Geophysics
Record 1, Main entry term, English
- audio-frequency magnetic field
1, record 1, English, audio%2Dfrequency%20magnetic%20field
correct
Record 1, Abbreviations, English
- AFMAG 1, record 1, English, AFMAG
correct
Record 1, Synonyms, English
- audio frequency magnetic field 2, record 1, English, audio%20frequency%20magnetic%20field
correct
- AFMAG 2, record 1, English, AFMAG
correct
- AFMAG 2, record 1, English, AFMAG
- audiofrequency magnetic field 3, record 1, English, audiofrequency%20magnetic%20field
correct
- AFMAG 3, record 1, English, AFMAG
correct
- AFMAG 3, record 1, English, AFMAG
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Among the natural field EM [electromagnetic] methods are the AFMAG (audio-frequency magnetic field), the AMT (audio-magnetotelluric), and the magnetotelluric methods, which make use of the electromagnetic energy in selected frequency ranges from natural sources such as lightning discharges and ionospheric oscillations. 1, record 1, English, - audio%2Dfrequency%20magnetic%20field
Record number: 1, Textual support number: 2 CONT
The first "passive transmitter" AEM system, AFMAG was introduced in 1958. This system utilised a natural audiofrequency magnetic field arising from atmospheric discharges as the source of the primary field. 3, record 1, English, - audio%2Dfrequency%20magnetic%20field
Record 1, French
Record 1, Domaine(s)
- Prospection magnétique et électromagnétique
- Recherches et prospections géologiques
- Géophysique
Record 1, Main entry term, French
- champ magnétique de fréquence audio
1, record 1, French, champ%20magn%C3%A9tique%20de%20fr%C3%A9quence%20audio
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
[...] la méthode AFMAG est basée sur les champs magnétiques de fréquence audio engendrés par des éclairs produits lors des orages électriques. 1, record 1, French, - champ%20magn%C3%A9tique%20de%20fr%C3%A9quence%20audio
Record 1, Spanish
Record 1, Textual support, Spanish
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