HR: 1340h
AN: T33A-1358    [Abstracts]
TI: Near field and surface contributions to shear-wave splitting, waveform and traveltime sensitivity kernels
AU: * McGee, P
EM: pmcgee@princeton.edu
AF: Department of Geosciences, Princeton University, Guyot Hall, Washington Rd., Princeton, NJ 08544-1003 United States
AU: Dahlen, T
EM: fad@princeton.edu
AF: Department of Geosciences, Princeton University, Guyot Hall, Washington Rd., Princeton, NJ 08544-1003 United States
AB: We calculate shear-wave splitting, waveform and traveltime Fr\'echet sensitivity kernels near the receiver in a homogeneous medium. Sensitivity kernels for anisotropic parameters are derived. Near-field and surface effects near the receiver are important when imaging the lithosphere as well as conducting global tomographic inversions. Sensitivity kernels are based upon finite-frequency seismology which accounts for the effects of perturbations off the ray path upon seismic observables at the receiver. In the far field the kernels are insensitive along the ray path, this is no longer true in the near-field region close to the receiver where the kernels are maximally sensitive. These sensitivity kernels account for near-field, far-field, surface waves and reflected waves off the free surface.
DE: 7260 Theory and modeling
DE: 7200 SEISMOLOGY
DE: 7203 Body wave propagation
DE: 7218 Lithosphere and upper mantle
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting