Abstract
The application of the Ground Penetrating Radar (GPR) method which was carried out in the Prambanan District, Sleman, Special Region of Yogyakarta was to determine the geometry of the slip plane of potential landslides. This method can see the contrast between the slip plane of the landslide and the landslide material that is above the slip plane. Measurements were made on field "A" consisting of 6 tracks and field "B" consisting of 7 tracks. The cross section of the radargram shows a penetration depth of about 6 - 7 meters, divided into 3 layers, namely, the S1 layer (soil), the S2 layer (transition zone), and bedrock. The depth of the slip field for potential landslides produced at the boundary layers of S1 and S2 is about 1 – 1.5 meters and the depth of the boundary layers for s2 and bedrock is about 2 – 3 meters. The geometry distribution map of the slip plane shows the type of landslide in the form of a translational landslide.
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