Using real induction vector data, collected at 958 European observatio
n sites, together with our data from the Bohemian Massif and the West
Carpathians, we have generated a contour map of the transfer function
TFI (corresponding to transfer function A in Wiese's relation). Only t
he zero contour is retained and shown on the map. It clearly marks the
main anomalous induction zones, related to internal structural inhomo
geneities, across Europe.