Local differences in topography (such as the presence of mountains), geology (such as the density of rocks in the vicinity), and deeper tectonic structure cause local and regional differences in the Earth's gravitational field, known as gravitational anomalies. Brand Name, Rack-A-Tiers, Sub Brand Item Name, Laser Plumb Bomb, Type Material, Solid Brass, Includes Application, For all Commercial, Industrial or. The actual depth dependence of density and gravity, inferred from seismic travel times (see Adams–Williamson equation), is shown in the graphs below. Laser Level, RockSeed 100 Feet Cross Line Laser with Self-Leveling, Vertical and Horizontal Line, Rotatable 360 Degree, Carrying Pouch, Battery Included (Red) 8,102. It is a vector quantity, whose direction coincides with a plumb bob and strength or magnitude is given by the norm g = ‖ g ‖ The gravity of Earth, denoted by g, is the net acceleration that is imparted to objects due to the combined effect of gravitation (from mass distribution within Earth) and the centrifugal force (from the Earth's rotation). Red shows the areas where gravity is stronger than the smooth, standard value, and blue reveals areas where gravity is weaker. ![]() Earth's gravity measured by NASA GRACE mission, showing deviations from the theoretical gravity of an idealized, smooth Earth, the so-called Earth ellipsoid.
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