On the use of line current analogues in geomagnetic depth sounding

A. G. Jones

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Various workers have appealed to Biot-Savart's law for interpreting their anomalous geomagnetic response functions as an aid to describing the electromagnetic induction process. This approach, of using such a line current analogue, is shown herein to be erroneous if the conductivity of the lower half-space is not taken into consideration. A numerical solution, using an FFT, is derived from the kernels of the electromagnetic field components involved, and is compared with the simplistic solution offered by Biot-Savart's static field approximation. Uses of a line current in a conducting half-space as a suitable analogue of the true induction processes are illustrated with comparison to 3 anomalies - a conducting block, Alert, and the Great Glen fault.-Author

Original languageEnglish
Pages (from-to)56-62
Number of pages7
JournalJournal of Geophysics - Zeitschrift fur Geophysik
Issue number1
Publication statusPublished - 1986
Externally publishedYes


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