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Magnetic data interpretation faces difficulties due to the various shapes of magnetic anomalies and the positions of their extrema with respect to the causative bodies for different directions of the source magnetization. The well‐known transforms — reduction to the pole, pseudogravity field, and analytic signal (total gradient) — help in reducing the problem. Another way to achieve the required effect is the transformation of magnetic data, ΔT or Z, into values of the anomalous magnetic intensity T. In this respect, we have found some transforms based on differential operators such as the gradient of T and its modulus R = |∇T|, the Laplacian L = ∇² T, the product T ∇² T and its square root Q, and the Laplacian ∇²(T ²) and its square root E, to be useful. They are slightly sensitive to the magnetization orientation and their extrema occur above the sources.

For a 2D anomaly of a …