Open AccessSome Problems of Electromagnetic Induction in the Equatorial Electrojet Region‐I Magneto‐telluric Relations
Author(s) -
Hutton Rosemary
Publication year - 1972
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1972.tb06128.x
Subject(s) - geophysics , equator , electrojet , magnetic dip , magneto , electromagnetic induction , equatorial electrojet , electrical resistivity and conductivity , geology , earth's magnetic field , magnetic field , geodesy , electric field , physics , thermodynamics , latitude , power (physics) , quantum mechanics , electromagnetic coil
Summary General theoretical expressions have been obtained for time variations of the magnetic and electric fields in the vicinity of the magnetic dip equator. From these, magneto‐telluric ratios have been determined for a number of earth models, including the general case of n stratified layers, and these are found to be functions of the dimension of the inducing field as well as of the earth conductivity structure and the period of the variation. Model apparent resistivity curves have been computed for the same earth models as used by other research workers and the differences between them are discussed. Some of the problems which have to be considered in the practical application of the magneto‐telluric expressions are noted and attention is drawn to the rapid change in the value of the apparent resistivity with electrojet width for variations of period greater than several hours.