During the 1970's and 80's SLU students and I completed several studies of seismic surface-wave dispersion in both continental and oceanic regions. In oceanic regions, G.K. Yu and I regionalized surface-wave dispersion data to produce shear-wave models for four regions of the Pacific. We found that shear-wave velocities increase systematically going east to west from younger to older lithosphere (in agreement with some earlier studies) and that anisotropy of upper mantle elastic properties was required to explain both Love- and Rayleigh-wave dispersion. Studies with Winston Chan and Shyh-jeng Chiou showed the profound effect that sediments could have on surface-wave propagation along continental shelves and work with Oznur Mindevalli indicated the possible existence of anisotropy (transverse isotropy with a horizontal axis of symmetry) in the upper crust of Turkey.

Yu, G.K., and B.J. Mitchell, Regionalized shear velocity models of the Pacific upper mantle from observed Love and Rayleigh wave dispersion, Geophys. J. Roy. Astr. Soc., 57, 311-341, 1979.

Mitchell, B.J., and R.B. Herrmann, Shear velocity structure in the eastern United States from the inversion of surface-wave group and phase velocities, Bull. Seism. Soc. Am., 69, 1133-1148, 1979.

Mitchell, B.J., and G.K. Yu, Surface wave velocities, regionalized velocity models, and anisotropy of the Pacific crust and upper mantle, Geophys. J. Roy. Astr. Soc., 63, 497-514, 1980.

Mitchell, B.J., On the inversion of Love and Rayleigh wave dispersion and implications for Earth structure and anisotropy, Geophys. J. Astr. Soc., 76, 233-241, 1984.

Chan, W.W., and B.J. Mitchell, Surface wave dispersion, crustal structure, and sediment thickness variations across the Barents shelf, Geophys. J. Roy. Astr. Soc., 80, 329-344, 1985.

Chiou, S.J., and B.J. Mitchell, Regional variations in the crustal structure of northern Canada from surface wave dispersion, J. Geodynamics, 6, 53-69, 1986.

Mindevalli, O.Y., and B.J. Mitchell, Crustal structure and possible anisotropy in Turkey from seismic surface wave dispersion, Geophys. J., 98, 93-106, 1989.

Vig, P.K., and B.J. Mitchell, Anisotropy beneath Hawaii from surface wave particle motion observations, Pure and Appl. Geophys., 133, 1-22, 1990.