Time-Domain Electromagnetics (TDEM), also known as Transient Electromagnetics (TEM), is a geophysical technique where a transient current pulse is injected into the ground via a transmitter coil; once the signal is abruptly switched off, the induced subsurface eddy currents decay and generate secondary magnetic fields, which are recorded by a receiver coil. By analyzing the temporal decay of these signals, geophysicists can infer variations in subsurface electrical resistivity (or its inverse, conductivity) across depths ranging from tens to several hundreds of meters—making TDEM especially suitable for mobile, aerial, or surface surveys in areas with resistive surface layers
Partner with SLA Geophysics to leverage TDEM and complementary geophysical services tailored to your project needs. Contact us today for a free quote, and let's uncover what lies beneath—efficiently, accurately, and responsibly.