Research interests

In global seismic tomography, one challenging way to achieve high-resolution images of the Earth's interior is in elaborating more accurate theories. A promising approach seems to be Born theory, a single scattering theory, which becomes most important for seismic surface waves.  

Main focus of my work is on the propagation of surface waves, such as Rayleigh or Love waves at periods between 35 s and 150 s, and their scattering sensitivity. To gain a computation speed-up, reduction to two-dimensions can be done by the surface membrane wave method (Tanimoto, 1990; Tape, 2003). Basically, it is wave propagation on a spherical membrane.

You will find some more detailed informations about how to deal with this nice issue on the following pages:
- The finite-differences code for wave propagation on a spherical membrane is available here: Membrane Waves
- The 3-D shear-velocity model of the European-Mediterranean region is available here: Tomography

Publications

Peter, D., L. Boschi and J.H. Woodhouse, 2009. Tomographic resolution of ray and finite-frequency methods: a membrane-wave investigation , Geophys. J. Int., 177, 624-638.

Peter, D., L. Boschi, F. Deschamps, B. Fry, G. Ekstrom, and D. Giardini, 2008. A new finite-frequency shear-velocity model of the European-Mediterranean region , Geophys. Res. Lett., 35, L16315, doi:10.1029/2008GL034769.

Peter, D., C. Tape, L. Boschi and J. H. Woodhouse, 2007. Surface wave tomography: global membrane waves and adjoint methods , Geophys. J. Int., 171, 1098 - 1117.

Boschi, L., J.-P. Ampuero, D. Peter, P.M. Mai, G. Soldati, D. Giardini, 2007. Petascale computing and resolution in global seismic tomography , Phys. Earth planet. Inter., 163, 245-250. doi:10.1016/j.pepi.2007.02.011.