A balanced edge detector for aeromagnetic data

Vinicius Theobaldo Jorge, Saulo Pomponet Oliveira, Luan Thanh Pham, Van-Hao Duong
Author affiliations


  • Vinicius Theobaldo Jorge Graduate Program in Geology, Federal University of Paraná, Curitiba, Brazil
  • Saulo Pomponet Oliveira Department of Mathematics, Federal University of Paraná, Curitiba, Brazil
  • Luan Thanh Pham University of Science, Vietnam National University, Hanoi, Vietnam
  • Van-Hao Duong VNU School of Interdisciplinary Studies, Vietnam National University, Hanoi, Vietnam




Aeromagnetic data, enhancement filters, magnetization direction, directional analytic signal, Southern Brazil.


One of the most significant challenges in interpreting magnetic data is to mitigate the influence of the magnetization direction in the shape of the anomalies, especially when reduction to the pole fails to position them over the sources. We propose a balanced high-order filter that has low sensitivity to the direction of the resultant magnetization. We consider an edge-detector filter based on directional analytic signals of the vertically-integrated anomaly field. To ensure that anomalies from shallow and deep sources are equalized, we balance this filter with the magnitude of its two-dimensional Hilbert transform. The proposed filter is tested using aeromagnetic data from Apiaí Terrane, Southern Brazil. The enhanced map is highly correlated with the study area's NE-SW trend of geological structures. Our results highlight the importance of using the directional analytical signals, which help reduce the influence of the magnetization direction, and the balancing filters, for equalizing the signal of shallow and deep causative sources.


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How to Cite

Theobaldo Jorge, V., Pomponet Oliveira, S., Pham Luan, T., & Duong Hao, V.-. (2023). A balanced edge detector for aeromagnetic data. Vietnam Journal of Earth Sciences, 45(3), 326–337. https://doi.org/10.15625/2615-9783/18461