Ground motion estimation due to future earthquakes is one of the most challenging problems in seismology and earthquake engineering. This topic include source and propagation-dominated ground motion phenomena (including energy channeling, rupture directivity, supershear), earth structure (Regional Ground Motion Prediction Equations) and sites effects (basin effects, liquefaction, triggering of landslides, and topographic effects). The assessments of those phenomena are required for potential expected events in a specific zone, for seismic hazard and seismic risk mitigation. This topic brings together earthquake seismologists and engineers.