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Mapping of geological structures based on horizontal gradient of gravity anomaly in Palu Valley, Central Sulawesi, Indonesia
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Mapping of geological structures based on horizontal gradient of gravity anomaly in Palu Valley, Central Sulawesi, Indonesia
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Journal Article
Mapping of geological structures based on horizontal gradient of gravity anomaly in Palu Valley, Central Sulawesi, Indonesia
2025
Overview
Palu is one of the cities that is a residential center in carrying out socio-political and economic activities located in the Palu valley. The existence of the Palu-Koro fault makes this city very vulnerable to earthquake shocks. Earthquake activity causes strong rock deformation that allows the formation of local faults in the Palu Valley. One of the mitigation steps that can be taken is to map the geological structure in this city. This study aims to map the geological structure using horizontal gradients on gravity anomaly data. Gravity measurements were carried out in Palu City and its surroundings with a research area of approximately 11 km x 6 km. Furthermore, data processing and analysis were carried out using horizontal gradient techniques on residual gravity anomaly data. The study produced several local faults that were mapped and spread across the western and eastern regions of the Palu Valley in varying directions. In the western region of the Palu Valley, a fault was identified that extends from north to south. This fault is estimated to be the Palu-Koro fault plane formed by an earthquake.
Publisher
IOP Publishing
Subject
