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sci.gravity-Bouguer-anomaly Calculator
Calculates the Bouguer gravity anomaly at a survey point by applying free-air, Bouguer slab, and terrain corrections to measured gravity. Negative Bouguer anomalies over mountains indicate isostatic compensation — the low-density crustal root extends deeper than topography, partially compensating its weight.
Inputs
G Obs Mgal
Reference formula or conversion factor shown for context.
Lat Deg
Reference formula or conversion factor shown for context.
Elevation M
Reference formula or conversion factor shown for context.
Rho G Cm3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Results
Bouguer anomaly (mGal)
Sample size or count used in the calculation.
normal gravity gn (mGal)
Sample size or count used in the calculation.
free-air correction +0.3086h (mGal)
Sample size or count used in the calculation.
Bouguer slab correction (mGal)
Sample size or count used in the calculation.
BA = g_obs - g_n + FA_corr - Bouguer_corr
Sample size or count used in the calculation.
interpretation
Qualitative summary of what the computed numbers mean in practical terms.