Three-dimensional sensitivity kernels for surface wave observables

Details Three-dimensional sensitivity kernels for surface wave observables Three-dimensional sensitivity kernels for surface wave observables

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004geoji.158..142z&link_type=abstract

Geophysical Journal International, Volume 158, Issue 1, pp. 142-168.

Astronomy and Astrophysics

Astronomy

78

Fréchet Derivatives, Global Seismology, Mode Coupling, Sensitivity, Surface Waves

Scientific paper

SUMMARY We calculate three dimensional (3-D) sensitivity kernels for fundamental-mode surface wave observables based on the single-scattering (Born) approximation. The sensitivity kernels for measured phases, amplitudes and arrival angles are formulated in the framework of surface wave mode summation. We derive kernels for cross-spectral multitaper measurements; as a special case, the results are applicable to single-taper measurements. Cross-branch mode-coupling effects are fully accounted for in the kernels; however, these effects can probably be ignored at the present level of spatial resolution in global phase-delay tomography. The narrowly concentrated spectra of the windows and tapers commonly used in global surface wave studies enable the kernels to be computed extremely efficiently.

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