Fluid Accumulation Zone by Seismic Attributes and Amplitude Versus Offset Analysis at Solfatara Volcano, Campi Flegrei, Italy

The imaging of volcanic systems is a challenging topic that attracts the scientific community’s attention. characterization structures and rock properties by means seismic active methods becoming fundamental for providing ultra-high-resolution images interest. Solfatara Volcano quiescent volcano in Campi Flegrei resurgent nested caldera continuously under investigation monitoring its shallow activity, such as fumaroles. purpose this work to characterize fluid accumulation zone first 150 m depth middle crater, using several post-stack attributes Amplitude Versus Offset (AVO) analysis contact between CO 2 condensed water shallower zone. two 400 m-long profiles which we refer have been acquired during Repeated InduCed Earthquakes Noise experiment. were deployed along with NNE-SSW WNW-ESE directions across whole surface crater including main anomalies fumaroles, eastern area, mud-pool Fangaia, located western area. pre-processing, pre-stack processing, previously applied on profile are here performed time profile, while partial-stack AVO both profiles. gain, envelope, energy, root mean square computed extracted determining maximum minimum values amplitude zones migrated Such provided complex geometrical embedding information faults chaotic zones. technique has also used direct gas indicator enhance discrimination identification. Finally, attributes, near-surface structural interpretation related incorporated into proposed analysis. multi-2D image depicts fluids trapped at depths ranging from 10 50 below crater’s surface, well their migration paths up deep: evidenced probably due solfataric alteration minerals, caused arising plume abovecondensed decreases permeability rocks forms an argillic phase working cap-rock trapping gases. application analysis, coupled attribute’s investigation, provides very detailed Volcano, outperforms terms accuracy ones obtained different tools previous works, evidences presence position liquid gases north-east area Volcano.