A geophysical survey is a method used to study the physical properties of the Earth's subsurface. It employs various techniques, such as seismic, magnetic, and electrical measurements, to gather data about geological formations. This information helps in locating resources like minerals, oil, and groundwater, as well as in assessing environmental conditions. These surveys are often conducted before construction projects or archaeological digs to understand the ground conditions. By analyzing the collected data, scientists and engineers can make informed decisions, minimizing risks and ensuring safety. Geophysical surveys play a crucial role in fields like geology, environmental science, and civil engineering.