Permeability is a fundamental physical property which helps dictate geological processes across a range of time- and length-scales. For example, during volcanic activity (e.g., magma transport, eruption) permeability can be created and/ or destroyed, controlling the means and efficiency of outgassing and, thereby, affecting eruption style and intensity. In addition, permeability and permeability anisotropy of crustal rocks dictate fluid flow in the lithosphere, controlling crustal pore pressures and seismicity along shallow or deep lithospheric structures, as well as the productivity and exploitation of georesources. Technological advances facilitate ever-more detailed descriptions of permeability and yet critical challenges remain; for example, understanding the evolution (e.g., creation or destruction) of permeability, the extent of processes as a function of time/ strain/ stress and the influence of realistic geological conditions (including temperature, large and/ or fluctuating pressure gradients, destructive pore fluids etc.). Here, we invite field-, experimental-, technical-, theoretical- and model-based studies that discuss or tackle permeability development, constraint or evolution critical to many facets of geoscience. Our intent is to foster strong interactions between research groups by soliciting contributions from diverse subdisciplines including (but not limited to) volcanology, rock and magma mechanics and physics, petrology, structural geology, and geophysics. We particularly welcome abstracts from early career scientists.