TS5.1 | Imaging of fault systems and geological structures through active and passive seismic methods
Imaging of fault systems and geological structures through active and passive seismic methods
Co-organized by SM6
Convener: Leonardo ColavittiECSECS | Co-conveners: Simona GabrielliECSECS, Sonja Halina WadasECSECS, Sergio GammaldiECSECS, Ferdinando NapolitanoECSECS

The imaging of Earth’s crustal structure is a challenging task in seismology and seismic, due to strong lateral discontinuities, heterogeneities and presence of fluids. Active and passive seismic methods are widely used to characterize tectonic structures and geological processes ranging from large to very shallow scale.
Active seismic methods using reflected and refracted waves have shown to be particularly useful in providing images and seismic velocity variations of the subsurface. Recently, important developments in the frame of data instrumentation, data acquisition and inversion methods have pushed the limits of spatial resolution, like the utilization of shear-wave and multi-component reflection seismic for shallow investigations. Despite these significant improvements, the interpretation of geophysical images and properties still remains ambiguous and shows several limitations, mainly due to the cost and availability of the instruments and the difficulties in exploring remote but also urban areas, as well as the loss of resolution with depth.
To overcome this obstacle, it can be useful to combine active and passive seismic methods. Furthermore, the number of high-quality seismic catalogs is increasing, thanks to new denser seismic networks and the use of artificial intelligence, improving knowledge of tectonic structures. This session shall promote the exchange of experience using cutting-edge active and passive seismic techniques with the aim of imaging and characterizing deep and shallow geological structures, in particular active and ancient faults in tectonic or volcanic settings but also intraplate regions.
We welcome contributions to technical developments, data analysis, seismic processing from both active methods like seismic reflection (P- and S- wave reflection seismic, multi-component methods, Vp/Vs analysis, traveltime tomography or full waveform inversion), seismic refraction and integrated drilling data, seismic attributes analysis, and passive techniques including seismic tomography (based on local earthquakes, ambient noise or converted waves), attenuation tomography, receiver functions, source imaging characterization also based on a data-driven approach and high-quality seismic catalogs, which reveal new insights about tectonic and volcanic structures.
We also encourage contributions using novel techniques based on complementary methods, such as data mining and machine learning.