Forward Modeling of Frequency-Domain EM Response of Vertical Magnetic Dipole Source over Layer Earth Models
Subject Areas :
Keywords: EM Forward modeling Frequency-Domain Vertical magnetic dipole source.,
Abstract :
Forward modeling of Frequency-Domain EM (FDEM) is a useful tool for understanding complex behavior of electromagnetic wave in heterogeneous media, for doing inverse modeling, and also for evaluation of geological interpretations based on FDEM measurements. In this paper, we programmed a code in MATLAB which incorporates a Fortran77 algorithm, as a MEX function for computing EM response of a Vertical Magnetic Dipole source over layer earth models. By conducting the forward modeling code on different layer Earth models, real and imaginary parts of H_z component of the secondary field, normalized amplitude of the ratio of secondary to primary component of the vertical magnetic field (H_z/H_(z_0 ) ), and phase variations of the EM field are calculated and plotted for these models.