Seismicity and deformation in subduction and collisional settings result from diverse interacting processes operating over a wide range of spatial and temporal scales. Subduction zones, which account for 90% of the global seismic moment release, host a spectrum of earthquakes from shallow megathrust and overriding-plate events to intermediate- and deep events, while collisional settings show distributed faulting and complex interactions between shortening, strike-slip and extensional deformation. In both settings, the role of stress transfer, fluids and lithospheric structure remains central questions in understanding earthquake occurrence.
This session invites interdisciplinary contributions that address the mechanics controlling seismicity and fault deformation in subduction and collisional settings. We welcome studies that integrate seismological, geodetic, and modelling approaches to address key questions including: (i) what physical processes control seismicity patterns and fault behaviour across different depths and tectonic settings?; (ii) How do stress interactions, rheology, fluids, climate and surface processes drive the spatial and temporal evolution of seismicity?; (iii) How can multi-scale observations, from high-resolution geophysics to paleoseismology, improve our understanding of active fault systems and short- to long-term seismic hazard assessments?
By bridging insights from different convergent margins, this session aims to advance our understanding of earthquake generation and the factors shaping seismic hazard worldwide.