Open AccessThe existence of a region inaccessible to magneto‐telluric sounding
Author(s) -
Parker Robert L.
Publication year - 1982
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.1982.tb06967.x
Subject(s) - magnetotellurics , linearization , exponential function , consistency (knowledge bases) , depth sounding , geophysics , attenuation , geology , magneto , quadratic equation , function (biology) , conductivity , mathematical analysis , mathematics , electrical resistivity and conductivity , nonlinear system , physics , geometry , optics , power (physics) , oceanography , quantum mechanics , evolutionary biology , biology
Summary. The exponential attenuation of fluctuating electromagnetic fields suggests that practical magneto telluric measurements may be uninformative about the electrical conductivity at sufficiently great depths. This notion can be made precise for one‐dimensional systems. Below a critical depth the conductivity function may be chosen freely without affecting the consistency of the model with the data. This depth is readily computable with quadratic or linear programming techniques and does not rely upon linearization of the equations.