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use of apparent complex frequencies of free oscillations to estimate aspherical structure of the Earth
Author(s) -
Shibata Naoki,
Suda Naoki,
Fukao Yoshio
Publication year - 1991
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl00995
Subject(s) - predictability , multiplet , inversion (geology) , physics , statistical physics , mathematical analysis , mathematics , computational physics , geophysics , geology , quantum mechanics , paleontology , structural basin , spectral line
A formula is developed to relate observed apparent complex frequencies of a multiplet to the interaction coefficients of the splitting matrix. This formula is then incorporated into an inversion scheme: estimating the interaction coefficients from the observed apparent complex frequencies. The numerical experiments demonstrated an excellent predictability of our method both in data (apparent complex frequencies) space and in model (aspherical structure of elasticity and anelasticity) space.