Seismic surveys are a method used to explore the Earth's subsurface by sending sound waves into the ground. These waves bounce back when they hit different layers of rock or soil, and the data collected helps scientists and engineers understand what lies beneath the surface. This technique is commonly used in the fields of geology, oil and gas exploration, and environmental studies. The process involves using specialized equipment, such as geophones and seismographs, to record the reflected waves. By analyzing this data, researchers can create detailed images of underground formations, which aids in locating natural resources and assessing geological hazards. Seismic surveys are essential for safe construction and resource management.