Interpretation of 2D magnetic anomalies using wavelet transform
Sergei A. Merkuriev · Geomagnetism and Aeronomy · 2025
Determination of the boundaries of anomaly-forming bodies (deep sources) is an important step in interpreting potential field anomalies during geophysical research. In this paper, a method based on continuous wavelet analysis of magnetic profiles is proposed to solve this problem. The connection between the parameters of simple bodies and the properties of the wavelet transformation of the field created by these bodies is shown. A technique has been developed for determining the boundaries of blocks of the magnetically active layer. The proposed method was tested on model data of the simplest single bodies and on a spreading model. The high resolution of the method is shown, which makes it possible to determine the boundaries of blocks of the spreading model with an accuracy of up to 400 m. The method was applied to a real magnetic profile crossing a typical oceanic structure: the mid-ocean Reykjanes Ridge. The results obtained confirm that the proposed method has a higher resolution compared to the analytical signal and allows the identification of narrow blocks. To clarify the boundaries of these blocks, it is planned to develop a methodology based on the modeling results.