Geophysical instruments are tools used to measure and analyze physical properties of the Earth. They help scientists study various aspects such as gravity, magnetic fields, seismic activity, and electromagnetic fields. These instruments are essential for understanding geological processes, natural resources, and environmental changes. Common types of geophysical instruments include seismometers, which detect ground vibrations, and magnetometers, which measure magnetic fields. Other instruments, like gravimeters, assess variations in gravity, while ground-penetrating radar helps visualize subsurface structures. Together, these tools provide valuable data for research in geology, archaeology, and environmental science.