Geoelectric Analysis for Potential Slip Plane Interpretation in Labuan Bulan Hill, Salem District, Brebes Regency, Central Java

Abstract Landslide is a natural disaster which often occurs in Indonesia. Based on National Disaster Management Agency (BNPB), there were 1,321 landslide incidents occurred 2021. Labuan Bulan Hill located high susceptibility seen from Susceptibility Zone of Brebes Regency, furthermore, soil tensile cracks presence with 5 - 50 cm width and 15 125 height at upper slope. In this study, the identification subsurface lithologies potential slip plane was carried out using geoelectric survey method Wenner – Schlumberger configuration. The configuration has deeper penetration than other configurations. Geoelectric surveys are two lines 240 m length electrode space. line made parallel perpendicular slope direction to estimate conditions easier help surface. Results measurements identified that layer consists poorly graded silty sand 285 Ωm 1700 resistivity, second moderate highly weathered volcanic breccia 129 third fresh slightly 1388 resistivity. A as 20 30 depth.