An active fault zone traversing West Java has been discovered by the\nGeological Survey Centre (PSG) of the Ministry of Energy and Mineral\nResources. This fault is considered crucial because its path passes\nthrough areas of vital infrastructure, such as toll roads.<\/p>\n
The finding results from mapping activities conducted in Majalengka,\nSumedang, and Subang regencies. The primary objective of this survey is\nto map and monitor potential tectonic disaster risks in those areas.<\/p>\n
To ensure data accuracy, PSG Head Edy Slameto directly inspected the\nresearch team in the field in October 2025. The activity focused on\ndirectly monitoring geological conditions and ensuring the entire survey\nprocess ran smoothly.<\/p>\n
Edy explained that this monitoring is vital to guarantee the accuracy\nof field mapping data.<\/p>\n
\u201cThis activity aims to ensure the smooth implementation of the\nsurvey, while also monitoring field geological conditions related to the\npotential active fault in the region,\u201d he stated, quoted on Saturday\n(2\/5\/2026).<\/p>\n
The field visit targeted the first location on the Cisumdawu Toll\nRoad at Kilometre 177, Bojongtotor Hamlet, Sirnamulya Village, North\nSumedang Subdistrict. This site experienced a landslide at the end of\nMay 2025 with fairly intensive soil subsidence due to weather\nfactors.<\/p>\n
Edy outlined that the soil structure around the toll road has\ncomplexities requiring extra supervision.<\/p>\n
\u201cInitial observations indicate that soil movement in this area is\npotentially influenced by complex lithological and geological structural\nconditions, thus requiring further monitoring for risk mitigation around\nstrategic infrastructure like toll roads,\u201d he said.<\/p>\n
The second location visited was in Girimukti Village, North Sumedang\nSubdistrict, where the team found rock exposures indicating the presence\nof the active Cileunyi - Tanjung Sari fault zone. The survey team\nimmediately conducted documentation and measurements of the fault plane\norientation to determine the direction and characteristics of the rock\ndeformation occurring.<\/p>\n
The visit on that day then continued to the third location in Cibuluh\nVillage, Ujung Jaya Subdistrict, Sumedang Regency. In this area, rock\nexposures with broken layers were found, indicating ongoing tectonic\nactivity to this day.<\/p>\n
Edy emphasised that the fault zone in the region remains highly\nactive as it is seen cutting through the youngest soil layer.<\/p>\n
\u201cThe fault section that cuts through to the youngest surface layer\nindicates that the fault zone in this region is still active and has the\npotential to cause deformation in the future,\u201d he asserted.<\/p>", "url": "https:\/\/jawawa.id\/newsitem\/active-fault-cutting-through-the-youngest-soil-layer-discovered-traversing-west-java-1777739535", "image": "" }, "sponsor": "Okusi Associates", "sponsor_url": "https:\/\/okusiassociates.com" }