Tectonic plate motion is accommodated through aseismic and seismic slip on faults, visco-elastic processes, and permanent plastic deformation. These processes control the stress redistribution throughout the Earth’s crust at all spatio-temporal scales, from localized earthquakes to long-term and -wavelength viscous interaction. The contribution of other factors, such as fluids, also play an important role in the mechanism of such processes. Understanding the physics and the energy partitioning between these processes at all scales and in various tectonic settings is essential to assess their impact on the seismic cycle. To improve our comprehension in the partitioning between seismic-aseismic slip and brittle-ductile deformation at all scales, we invite contributions that explore the themes described herein, through geophysical and geological observations, laboratory experiments, numerical modelling, and the integration of multiple approaches.