Highlights

Seismic scatterer imaging using shot array beamforming: method and application to the Campi Flegrei

Conception, verification and application of innovative techniques to study active volcanoes, Edited by Warner Marzocchi e Aldo Zollo, ISBN 978-88-89972-09-0, 2008.
N. Maercklin

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.