The focus of this TG is on any aspects of wave propagation and imaging on a
scale where the (near-) spherical geometry of our planet has to be accounted
for. This area undergoes a fundamental change at the moment, primarily in
connection with the computational methods that are being further developed
and applied within SPICE: we are now able to carry out 3D simulations for
globally observed large earthquakes almost on a routine basis.
We are undertaking a benchmarking
exercise of global inversion algorithms using complete 3D synthetic
seismograms derived from spectral element calculations. The goal is to test
how current imaging techniques are limited by approximations in theory and the
inadequacy of data quality and coverage. Our set of synthetic seismograms will
be made available to the community worldwide.
One development within SPICE is the initiation of a European effort to
improve our knowledge of crust and mantle structure in the European and
Mediterranean region. SPICE focuses on devising methods and tools that will be
applied to identify a new consensus model in the framework of FP6 project
Determining a new model requires that we assess the quality of existing ones:
we collect a database
of global and regional tomographic models, and provide tools for their
visualization and comparison.
Check the SPICE software
library for our contributions.