Geophysics 424 - Electromagnetic and potential field methods

MATLAB scripts for MT

Attenuation of MT signals in the Earth

• attenuation.m Shows how the electric field is attenuated as it travels into the Earth.
• atten_movie.m Movie of MT signal attenuating as it travels vertically into the Earth. Shows x-y plot of E-field.
• atten_movie_col.m As previous script, but shows wavefronts of electric field as a colour contour plane.
• MT_physics_correct_movie.m Physics of MT showing reflection and transmision of a plane wave.

1-D MT modelling code

• MT1Dfit_v2007.m 1-D modelling program for fitting MT data (revised 2007 with error floor).
• Sample model file
• Sample data file

Magnetotelluric Time series analysis

• Analogue-to-digital conversion

Frequency domain EM

• VLF fields over a conductor
• VLF simulator

Time domain EM

• Time domain responses for range of TX waveforms