Abstract
The shallow crustal structure of the Campi Flegrei caldera, southern
Italy, is imaged with P-to-P scattered seismic waves. The imaging
(migration) method is based on array beamforming and coherence analysis
of the scattered phase. Airgun shots from a controlled-source seismic
experiment are grouped into arrays, and a 1-D background velocity
model is used to calculate travel times for potential scatterer locations
on a regular grid in the image volume. A high coherence measured
on aligned traces indicates the presence of a scatterer at the corresponding
location. A stack of the individual images from several pairs of
a shot array and a single receiver provides the final image. First
results show a prominent region of seismic scattering that coincides
with the buried caldera rim.
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