Open AccessDepth of sources of gravity anomalies
Author(s) -
Khan M. A.
Publication year - 1977
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1977.tb01296.x
Subject(s) - geology , geophysics , geodesy , harmonics , spherical harmonics , free air gravity anomaly , degree (music) , gravity anomaly , hydrostatic equilibrium , physics , amplitude , bouguer anomaly , quantum mechanics , voltage , acoustics
Summary Sources of low degree gravity harmonics ( n ≤ 11) or of approximately 15°× 15° mean global gravity anomalies, now welldetermined from satellite observations, lie in the top third of the mantle provided it is assumed that they are produced by random density distributions. Higher degree gravity harmonics, though not yet accurately determined, seem to derive from mass variations in the upper mantle. Non‐hydrostatic part of the second degree gravity harmonic requires separate interpretation.