Analysis on Subaerial Electric Field Radiated by a Unit Electric Current Source in the Ground

Abstract

The expressions of subaerial electric field excited by a unit electric current source in the ground, are derived using the method of image charges, and we have studied the attenuation and radiation directivity of the electric field from the current source. Lower frequency below ELF (extremely low frequency, less than 1kHz) is our interest. The main emphasis of this paper is the study on the condition and possibility for detecting seismogenic emissions for various orientations of the electric current source (from horizontal to vertical).