Tracing Baribis active fault continuity in the Subang region using gravity edge detection analysis

Abstract

Elucidating the Baribis active fault in the central part of West Java is challenging due to the lack of physiography appearance. A gravity survey was conducted on 838 stations around the North of Bandung to Subang region to identify its buried spatial fault continuity. Regular processing routine reduced the observed gravity acceleration to generate the refined Bouguer anomaly map. Additionally, edge detection techniques (e.g., tilt derivative and analytic signal) were analyzed to delineate the proven fault emergence from the published active fault database and surface geological map. The results depict that the Baribis fault was continued to the Subang region and enhanced clearly by applying analytic signal attributes. Thereby, the Baribis fault continuity is better interpreted on the analytic signal anomaly map, whereas the tilt derivative technique explains the factor of unclear surficial discontinuity of Baribis fault on the zone.