Open AccessMultiple resolution surface wave tomography: the Mediterranean basin
Author(s) -
Boschi L.,
Ekström G.,
Kustowski B.
Publication year - 2004
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1111/j.1365-246x.2004.02194.x
Subject(s) - geology , crust , tomography , seismic tomography , surface wave , geophysics , seismology , phase velocity , mantle (geology) , rayleigh wave , geodesy , image resolution , inversion (geology) , physics , optics , tectonics
SUMMARY From a large set of fundamental‐mode surface wave phase velocity observations, we map the transversely isotropic lateral heterogeneities in the upper‐mantle shear velocity structure. We design a multiple resolution inversion procedure, which allows us to parametrize any selected region more finely than the rest of the globe. We choose, as a high‐resolution region, the upper mantle underlying the Mediterranean basin. We formulate the inverse problem as in a previous paper by Boschi & Ekström, calculating regional JWKB (Jeffreys–Wentzel–Kramers–Brillouin) surface wave sensitivity kernels for each pixel of a 2°× 2° starting model, including the high‐resolution global crustal map Crust 2.0. We find that the available surface wave data can resolve the most important geophysical features of the region of interest, providing a reliable image of intermediate spatial wavelength.