The resolution of whole Earth seismic tomographic models

Details The resolution of whole Earth seismic tomographic models The resolution of whole Earth seismic tomographic models

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005geoji.161..143s&link_type=abstract

Geophysical Journal International, Volume 161, Issue 1, pp. 143-153.

Statistics

Computation

8

Scientific paper

We evaluate the resolution of whole Earth structure achieved by compressional wave traveltime data from the International Seismological Centre (ISC); the measure of resolution we employ, provided by the direct calculation of the model resolution matrix, is more rigorous than the traditional (and computationally cheaper) one obtained through synthetic/checkerboard tests. Our work completes the introductive study of Boschi (2003), where only mantle models derived with a very simple regularization scheme were considered. Here, we expand Boschi's database with measurements of compressional waves reflected by, or refracted through, the Earth's core-mantle boundary (CMB) and core. In analogy with the work of Soldati et al. (2003), we treat CMB topography and heterogeneous outer core structure as free parameters of our inversions; analysing model resolution matrices, we attempt to explain the known discrepancy between deep Earth structure mapped by seismic waves reflected and refracted by the core.

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