Fasies Sedimen Kuarter Kaitannya Dengan Potensi Likuefaksi Di Kawasan Das Cimanuk, Indramayu, Jawa Barat

The lower Cimanuk catchment area which will be developed as industrial is dominated by Quaternary deposits are susceptible againts liquefaction if large earthquakes occurred. presence of Subang, Cirebon 1 and 2 active fault segments trigger earthquake potentially liquefaction. This study aims to characterize the type sedimentary facies induced hazard in area, Indramayu, West Java. research methods consist borehole description analysis based on CPT CPTu data with cone resistance (qt) corrected value, friction ratio (Fr), laboratory potential SNI 1726:2019, deterministic 2,500 years return period PGA value. Based association there three that area. First, delta plain consisting fluvial sands, silt clay. Second, front beach ridge sands sandy silt. Third, clay prodelta facies. Liquefaction N-SPT, shows almost all test point liquefied, especially silty sand more northern region caused low density sediments (N-SPT value < 10 or qc 6,000 kPa).