<p>This paper presents physics-based broadband near-fault ground motion synthetics due to various scenarios of Mw 6.0 strike-slip earthquake and its sensitivity to changes in the source parameters, namely slip pattern, nucleation position, and average rupture velocity. The randomization of these source parameters is also carried out on the rupture plane. Further, the parameters and geometry of the fault-roughness and fault-damage zone are common to all the various earthquake scenarios considered. Analysis of synthetics reveals that fault-parallel components are more sensitive to changes in slip pattern and least sensitive to changes in average rupture velocity. In contrast to this, fault-normal components are more sensitive to the change of nucleation position and average rupture velocity and less sensitive to the change of slip pattern. Damage zone trapping occurs in the case of only high-frequency seismic waves, depending on the velocity and width of the damage zone, and affects all the components of ground motion. Effects of damage zone trapping and rupture directivity at a site in the damage zone are proportional to the rupture length between the nucleation position and the recording station. Obtained very large variability of peak ground acceleration in the fault-normal and fault-parallel components calls for the physics-based broadband near-fault ground motion synthetics since ground motion prediction equations may not be efficient for providing ground motion parameters of earthquake engineering interest, particularly within and near the damage zone.</p>