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Authors: Boschi, L.* 
Ampuero, J.-P.* 
Peter, D.* 
Mai, M.* 
Soldati, G.* 
Giardini, D.* 
Title: Petascale computing and future breakthroughs in global seismology
Issue Date: 11-Feb-2007
Series/Report no.: / 163 (2007)
DOI: 10.1016/j.pepi.2007.02.011
Keywords: Tomography
Computational seismology
Inverse theory
Subject Classification04. Solid Earth::04.01. Earth Interior::04.01.03. Mantle and Core dynamics 
Abstract: Will the advent of “petascale” computers be relevant to research in global seismic tomography? We illustrate here in detail two possible consequences of the expected leap in computing capability. First, being able to identify larger sets of differently regularized/parameterized solutions in shorter times will allow to evaluate their relative quality by more accurate statistical criteria than in the past. Second, it will become possible to compile large databases of sensitivity kernels, and update them efficiently in a non-linear inversion while iterating towards an optimal solution. We quantify the expected computational cost of the above endeavors, as a function of model resolution, and of the highest considered seismic-wave frequency.
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