Many factors effect probing depth

in different conditions probing depth will have different values

practical work to calculate accurately

is generally not possible. Although some geophysical workers researched on magnetotelluric method to detect the depth of the factors on its regularity

but also can be introduced into the mathematical relationship between the further perfection. In this paper

with a special three layer section for example

first proposed the theory probing depth concept

and then use the MATLAB programming calculation

discusses the magnetotelluric method theory probing depth

probing depth reveals the general rule and the related influencing factors and probing depth between the mathematical function relationship.