10.------------------------, 10.------------------------. N:: IE w '" "'0.1 0 M z SIDE VIEW PLAN VIEW 0.01 LI --'---'---LLL-'---LLLlI -L---"---LLL..ll..L.LJ'-': ';;' 0.01 1 100 10 100 fr Fig. 1. The behavior of the magnetic and electric fields from a vertical magnetic dipole source at the surface of the earth (after Wait 1951,1955]). earth, the experimental curve so plotted should have the same shape as a portion of the ap propriate theoretical curve, but with the ordinates and abscissas shifted by an amount dependent on the resistivity. The conductivity can be determined from the amount of...