<p>Several landslides are reported to have occurred in Ngasinan, Purworejo, Indonesia, which is an area with pseudo sliding plane due to the absence of clear contact between soil and the impermeable hard bedrock. This phenomenon exposes soil layers to a depth of more than 10&#xa0;m, showing different observable physical properties and characteristics in the field but with similar geophysical properties. Therefore, this research aimed to apply geophysical measurements to determine the subsurface cross-section of the area with a focus on the physical characteristics of soil in pseudo-sliding plane of landslide. Electrical Resistivity Tomography (ERT) and Seismic Refraction Tomography (SRT) methods were applied to landslide crown zone to confirm geophysical measurements through direct observation of soil layers profile. The results showed that a combination of both methods identified three soil layers with the potential to become pseudo-sliding planes. However, the bedding section identified using a combination of two geophysical methods only reached a depth of 13&#xa0;m. The limitation of ERT method for landslide research was related to the long stretches recorded for field measurements even though more detailed data were produced compared to seismic refraction. The lowest resistivity value in ERT cross-section was a representation of a high conductivity value which showed the existence of layers with more water content and capable of becoming sliding planes. Furthermore, geophysical cross-section interpretation conducted using direct field observations showed super-thick soil consisting of layers with different resistivity and velocity values. The layers were identified as pseudo-sliding planes and served as the initial data for landslide mitigation strategy in the research area.</p>