Abstract
In this paper we have applied a tau-p inversion method based on a
non linear approach to a set of first P-arrival times from a 2-D
active seismic experiment performed at Mt. Vesuvius in 1994. The
initial seismic investigation is devoted to the study of the shallow
structure and the tau-p method has been used for modelling velocity
variations of a spherically concentric medium which is a better approximation
than a flat layer of the Vesuvius geometry. We are able to obtain
detailed 1-D velocity models along different specified sections of
the recorded seismic line. These sections span different depth ranges
and indicate strong lateral and vertical P-velocity variations in
the first 1 km of the volcano structure with values ranging from
about 1.5 km/s at the surface to 3.5-4.0 km/s at depth. The average
1-D concentric model obtained in this study can be used as a reasonable
starting model for iterative high-resolution tomographies of Vesuvius
velocity structures.
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