Splitting functions of long-period normal modes of the earth

Details Splitting functions of long-period normal modes of the earth Splitting functions of long-period normal modes of the earth

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9313716g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Nov. 10, 1988, p. 13716-13742.

Physics

66

Earth Mantle, Earth Planetary Structure, Vibration Mode, Data Processing, Kernel Functions, Power Spectra

Scientific paper

The nonlinear inverse problem of estimating the splitting coefficients of the earth's free oscillation eigenfrequencies is examined, using observed spectra of the multiplet for an array of sources and receivers as data. The problem is solved by an iterative, least squares procedure in which the individual data are the complex spectral values obtained by Fourier transformation of windowed, long-period accelerograms from the International Deployment of Accelerometers network. It is found that the splitting functions of free oscillations describe the splitting properties fully and provide linear constraints on three-dimensional earth models which are essentially model independent.

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