The active deformation along the southern margin of the central Alborz and in Tehran’s piedmont is partly accommodated by fault-related fold structures. According to morphotectonic investigations, some of these structures are controlled by the activity of blind thrust faults. Since the Pardisan fault is buried by thick Quaternary deposits, in this study, we used the passive seismic ambient vibrations method to locate and specify its subsurface geometry. Ambient vibrations are processed using the horizontal to vertical spectral ratio (HVSR) technique to estimate the dynamic parameters such as predominant frequency and resonance amplitude of sediments. The detected subsurface anomalies in a 2D cross-section are in agreement with the morphotectonic signals visible at the surface, indicating the location and geometry of the Pardisan blind fault zone around the Milad Tower