Land Gravity

A relative gravimeter is a precision instrument used to measure variations in the Earth's gravity field by comparing gravity differences between locations rather than measuring absolute gravity values. Its core principle relies on a spring system or mass-swinging components to detect tiny changes in gravitational force acting on a mass.

With sensitivities reaching the microGal level (1 μGal = 10⁻⁶ Gal), relative gravimeters are widely applied in geophysical exploration, volcano monitoring, groundwater studies, and crustal deformation observations. Thanks to their high portability and strong field adaptability, they are commonly used for extensive gravity survey lines.

Compared to absolute gravimeters, relative gravimeters require more frequent calibration but remain essential tools for high-resolution regional gravity variation monitoring.