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Submitted
Dec 6, 2022
Accepted
Aug 1, 2023
Published
Aug 31, 2023
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Abstract

The Palu-Koro fault surface rupture, the latest active fault trace, provides valuable geological evidence and a chance to study its geometry, including strike length and damage zone width. Direct measurements indicate a primary north-northwest orientation, ranging from N314oE to N357oE, with a slip value of 2.3 – 5 m. The central part of Palu City experienced the most significant displacement. The surface rupture damage effect on the active Palu City fault spans 11 to 56 m, perpendicular to the fault line, causing substantial damage to buildings, shifting foundations, and altering roads. Liquefaction effects like sand boils, cracks, and stagnant water occurred. No buildings or infrastructure in the damaged zone remain in good condition, categorizing the area as a high-hazard zone. Based on geotechnical engineering and building structure assessments, continuing to construct buildings along the fault path is strongly discouraged.

Article Details

How to Cite
Petta Laja, A., Sandra, Th. Musa, M. D., Abdullah, A. I., Jayadi, H., & Rivaldy, D. (2023). Surface Rupture Hazard of Palu-Koro Fault in Palu City. Gravitasi, 22(1), 23-30. https://doi.org/10.22487/gravitasi.v22i1.16195

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