Stability analysis and improvement of structural index estimation in Euler deconvolution

Euler deconvolution has been widely used in auto-matic aeromagnetic interpretations because it requires no prior knowledge of the source magnetization direc-tion and assumes no particular interpretation model, provided the structural index defining the anomaly falloff rate related to the nature of the magnetic source, is determined in advance. Estimating the correct struc-tural index and electing optimum criteria for selecting candidate solutions are two fundamental requirements for a successful application of this method. We present a new criterion for determining the struc-tural index. This criterion is based on the correlation between the total-field anomaly and the estimates of an unknown base level. These estimates are obtained fo