Magnetic interpretation using the 3-D analytic signal

  • Roest W
  • Verhoef J
  • Pilkington M
  • 115


    Mendeley users who have this article in their library.
  • 494


    Citations of this article.


A new method for magnetic interpretation has been developed based on the generalization of the analytic signal concept to three dimensions. The absolute value of the analytic signal is defined as the square root of the squared sum of the vertical and the two horizontal derivatives of the magnetic field. This signal exhibits maxima over magnetization contrasts, independent of the ambient magnetic field and source magnetization directions. Locations of these maxima thus determine the outlines of magnetic sources. Under the assumption that the anomalies are caused by vertical contacts, the analytic signal is used to estimate depth using a simple amplitude half‐width rule. Two examples are shown of the application of the method. In the first example, the analytic signal highlights a circular feature beneath Lake Huron that has been identified as a possible impact crater. The second example illustrates the continuation of terranes across the Cabot Strait between Cape Breton and Newfoundland in eastern Canada.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Walter R. Roest

  • Jacob Verhoef

  • Mark Pilkington

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free