The earthquake that shook Cianjur Regency on 21 November 2022 not\nonly left deep sorrow but also revealed a new geological feature in West\nJava. The Meteorology, Climatology, and Geophysics Agency (BMKG) has\nofficially identified a new active fault that was the primary trigger of\nthe disaster, which has subsequently been named the Cugenang Fault.<\/p>\n
This discovery is crucial because the area was previously not\nrecorded as having a specific active fault line at that precise\nlocation. The identification of the Cugenang Fault compels the\ngovernment and the community to review spatial planning and disaster\npreparedness within this red zone.<\/p>\n
The Cugenang Fault was discovered after BMKG technical teams\nconducted a comprehensive analysis following the magnitude 5.6\nearthquake that hit Cianjur. Initially, this earthquake was suspected to\nhave been triggered by activity from the Cimandiri Fault or the\nNyalindung-Cibeber Fault. However, based on focal mechanism analysis and\nthe distribution of aftershocks, a pattern was found that did not align\nwith previously existing fault lines.<\/p>\n
Through field surveys involving the mapping of surface ruptures, the\ndistribution of building damage, and the use of precision monitoring\ntechnology, BMKG concluded that a new fault extends across the Cugenando\nDistrict. This finding was officially announced at the end of 2022 as an\neffort to provide certainty regarding safe zones for building\nreconstruction.<\/p>\n
Based on the released data, the Cugenang Fault possesses the\nfollowing characteristics:<\/p>\n
Villages identified as being directly traversed by this fault line\ninclude Ciherang, Ciputri, Cibeureum, Nyalindung, Mangunkerta, Sarampad,\nTalaga, and Nagrak.<\/p>\n
The existence of the Cugenang Fault brings serious consequences for\nthe safety of settlements situated above it. The following potential\nhazards must be monitored:<\/p>\n
Areas located directly above the fault line (prohibited zones) face a\nhigh risk of extreme ground displacement and total building destruction\nif tectonic activity recurs.<\/p>\n
Through BMKG and BNPB, the government has established \u2018Prohibited\nZones\u2019 or red zones along the Cugenang Fault line. A recommended safe\nradius is approximately 200 to 500 metres from the fault axis. In these\nzones, the public is prohibited from rebuilding permanent\nresidences.<\/p>\n
Land within these red zones is advised to be repurposed for\nnon-residential use, such as green open spaces, agricultural land, or\nurban forests, in order to minimise future casualties.<\/p>", "url": "https:\/\/jawawa.id\/newsitem\/understanding-the-cugenang-fault-in-cianjur-discovery-path-and-earthquake-risks-1788278019", "image": "" }, "sponsor": "Okusi Associates", "sponsor_url": "https:\/\/okusiassociates.com" }