Electrical Resistivity Tomography

Electrical Resistivity Tomography (ERT) is a technique used to create images of the subsurface by measuring how easily electric currents flow through it. Electrodes are placed in the ground, and small electrical currents are sent between them. By analyzing how the current distributes and the voltage differences, geophysicists can identify variations in material properties, such as moisture content, rock type, or contamination. ERT helps in applications like environmental assessment, groundwater studies, and engineering investigations, providing a non-invasive way to visualize underground features with detail and accuracy.