ABSTRACT
The present paper deals with a rapid approach to depth determination of a buried structure
from magnetic anomalies. The problem of depth determination is transformed into the problem
of finding the zero-anomaly distances from the observed magnetic anomalies. Formulas have
been derived for different components of the magnetic anomalies (vertical, horizontal, and
total) due to long horizontal cylinders, thin dikes, and geologic contacts; and for vertical and
horizontal components only of the magnetic anomalies due to spheres. Procedures are also
formulated to estimate the amplitude coefficient (magnetic moment) and the index parameter
(the effective angle of magnetization). The method was applied to synthetic data with and
without random error and tested on a field example from India.