Análisis espectral en la separación de anomalías gravitatorias: implicaciones para la reducción del riesgo de desastres en la Costa Oeste de Aceh

This study assesses the effectiveness of satellite gravity methods in disaster risk mapping for the West Coast of Aceh, focusing on fault detection through variations in rock density. The collected data were processed to determine the complete Bouguer anomaly, with terrain corrections using an assumed density of 2.67 g/cm³. Local anomaly values ranged from -32.2 mGal to 27.2 mGal, with higher values in the northeast and lower values in the southwestern coastal areas. Spectral analysis was employed to separate regional and residual anomalies, enhancing the identification of local faults and deeper tectonic features. Gradient analysis was used to delineate geological boundaries, which were validated using geological maps. Horizontal derivatives revealed strong correlations with fault structures, while vertical derivatives highlighted major fault boundaries but were less effective at detecting smaller-scale features. The findings are expected to contribute to disaster risk reduction efforts and support sustainable development planning in West Coast of Aceh. Additionally, these results offer valuable insights for future research and decision-making in disaster mitigation.