Geoid

Abstract

Geoid is the best available physical model of the earth. It is measurable using gravimetry and satellite altimetry data. Because geoid is a gravity equipotential surface, near-surface configuration of the earth’s structure is reflected in geoid undulation. Tectonic forces that causes change in Earth’s lithospheric configuration, are thus correlatable with the temporal and spatial changes of the geoid. Recent advances in satellite technology has enabled to measure and monitor geoid undulations with an unprecedented precision. As a result, many important Earth System processes like tectonic plate movement, surface deformation, sea level changes, etc are now being measured and monitored on a global scale. These have contributed significantly towards better understanding of the tectonics of the Earth.