ANALISIS BAHAYA GEMPA BUMI KABUPATEN DAN KOTA BEKASI BERBASIS SKENARIO

Abstract

Data sekitar area penelitian diperoleh ISC global CMT. Geometri patahan Abstract Seismotectically, Bekasi Regency and Bekasi City are affected by earthquakes originating from subduction zones in the south of Java and active faults around the area. The latest research describes the existence of active faults extending from the Baribis fault, which crosses from Purwakarta, Cibatu (Bekasi), Tangerang and Rangkasbitung which have the possibility of causing future earthquakes. This study aims to analyze seismic hazards in Bekasi Regency and Bekasi City based on an earthquake scenario approach. Historical data and earthquake parameters around the study area were obtained from BMKG, USGS, ISC and the CMT global catalog. The Baribis fault geometry refers to the study of Koulali et al. Event based and simple fault source PSHA (Probabilistic Seismic Hazard Analysis) were used to estimate seismic hazards in the study area. Peak Ground Acceleration (PGA) at bedrock level corresponding to 2% exceedance of 50 years’ probability was calculated. The results of the study show the level of seismic hazard in Bekasi Regency and Bekasi City from the historical earthquakes that have occurred as well as the earthquake scenario that originated from the extension of the Baribis fault which might occur in the future. The results of the study are expected to be utilized in strategic planning for earthquake mitigation in Bekasi Regency and Bekasi City.