Earth movement or landslide is one of the most frequently geological natural disasters happening in many places in Indonesia. From topology point of view, the landslide occurs on the slope of more than 35 degree and comprises of weathered soil in particular, is very dangerous to the nearby infrastructures.

Generally, the research method employed to mitigate and to detect earth movement is geoelectrical (resistivity) survey. This technique is applied to understand the condition or the geology structure under the surface based on the variation on the specific resistance or resistivity of the rocks. This method in particular could distinguish the geology structures that are significantly different or contrast in their resistivity from their surrounding areas. In addition to identify the area which likely to have landslide, the technique could also be used to explore ground water, minerals, and geothermal potency.

The geophysics evidence observed on the slope landslide occurred several years ago. The downhill was cut to obtain the soil and rock materials for the land fill purpose. The hill was cut up to ±22 m above sea level, with the thickness of 10 m to 15 m. And this obviously resulted in the loss in support capability at the downhill. The landslide then occurred from the bottom side of the hill to the uphill at 108 above sea level. Prior to the occurrence, the cracks and fragmented materials were observed in various points, from 22 m to 108 m above sea level. The crack dimensions were varied from 10 cm to 50 cm, in the length of 1 m to 20 m, transverse perpendicular to the slope of the hill.