Vol.12 (2022) No. 4 ISSN: 2088-5334 Identification of Landslide Area Using Geoelectrical Resistivity Method as Disaster Mitigation Strategy Muhammad Fathur Rouf Hasan a , Aísyah Salimah a , Adi Susilo b,* , Ali Rahmat c , Muhammad Nurtanto d , Nunung Martina a a Department of Civil Engineering, Politeknik Negeri Jakarta, 16425, Depok, Indonesia b Department of Geophysics Engineering, Brawijaya University, Malang, 65145, Indonesia c Research Center for Limnology, Indonesian Institute of Sciences, Bogor, 16911, Indonesia d Department of Mechanical Engineering Education, Universitas Sultan Ageng Tirtayasa, Serang, 42124, Indonesia Corresponding author: * adisusilo@ub.ac.id Abstract— Extreme weather triggers high-intensity rainfall, and it triggers land movement that eventually becomes landslides. The water of rain will enter to the ground through the rock gaps and accumulate along the landslide area to reduce effective stress and reduce the shear strength of the soil. Morphologically, Sukaresmi Village, Cisaat Sub-District, Sukabumi Regency is located at the foot of Mount Gede with a bumpy surface relief. This condition is one factor that triggers landslides because the soil is prone to movement. This research aims to identify the field slope zone for landslide prediction in the Sukaresmi village, hoping that the surrounding community could anticipate further landslides. The research was carried out using the Geoelectrical Resistivity method of the Schlumberger configuration as many as eight measuring points with 1 m electrode spacing. This research indicates that the subsurface conditions are divided into three constituent rocks: Clay, Tuff, and Volcanic Breccia. The field slide zone is located between the Tuff rock and turf layer at a depth of 4-7. 5 m long, 82 m (Line 1), and 40 m (Line 2), with a resistivity value range of 56-158 Ωm. The efforts that the local government can make to anticipate the condition of the building to remain safe include analyzing soil stability, strengthening slopes, and making retaining walls to increase the value of the safety factor. Keywords— Disaster mitigation; landslide; geoelectrical resistivity; Sukabumi. Manuscript received 15 Mar. 2021; revised 29 Oct. 2021; accepted 10 Jan. 2022. Date of publication 31 Aug. 2022. IJASEIT is licensed under a Creative Commons Attribution-Share Alike 4.0 International License. I. INTRODUCTION Changes in extreme weather cause an increase in rainfall intensity [1]. Several disasters often occur when the rain intensity is high enough, such as floods and landslides. Landslides are a danger that causes damage to economic assets, including buildings, productive land, and casualties [2]. Indonesia is one of the countries that often experiences landslide natural disasters with high risk and is spread across almost all provinces. Rain is one of the triggers for soil movement; falling water will enter the ground through rock gaps and accumulate along the landslide area to reduce effective stress and reduce the shear strength of the soil [3]. Heavy rain is more effective at triggering landslides on slopes where the soil absorbs water easily. The process of landslides begins with water infiltration into the soil, which adds to the weight of the soil. When the water enters to impermeable soil layer, which functions as a field slide zone, the rotten soil above it will move along the slope and get out of its initial state [4]. Infiltration of water in the soil on the slope is one factor that triggers landslides. The condition of the increasingly steep slopes can trigger the intensity of landslides due to low soil stability. Landslides are influenced by soil conditions that are prone to movement. One area of Indonesia that often experiences landslides is Sukabumi Regency. Based on the information collected from the Indonesian Disaster Information Data (DIBI), the National Disaster Management Agency (BNPB), from 2014 to 2018, there were 95 landslides recorded. Whereas in 2019 (January- May), there were 26 landslides recorded [5]. One of the villages that experienced landslides is Sukaresmi Village, Cisaat Sub District, Sukabumi Regency; based on a field survey in July 2019, at least there are 3 points inside the village experienced landslides. Morphologically, Sukaresmi Village, Cisaat Sub-District, Sukabumi Regency is located at the foot of Mount Gede at an altitude of approximately 650 meters above sea level with a 1484