THE COMPUTATION OF SECOND VERTICAL DERIVATIVES OF GEOMAGNETIC FIELDS*Presented at the St. Louis Meeting of the Society, March 16, 1949. Manuscript received by the Editor April 12, 1949. Published by permission of the Director, U. S. Geological Survey.

Abstract

Abstract Second vertical derivatives of magnetic fields, because of their high resolving power, are often very useful in interpreting magnetic anomalies. Formulas are developed which permit their ready numerical computation. Comparisons are made between the resulting approximate values and the rigorous values obtained for simple idealized fields. The similarity between maps of second vertical derivatives of fields and those of certain types of residual fields is discussed.