A statistical analysis of magnetic profiles

Autocorrelation functions are computed for profiles of D, H, and Z obtained by a three-component airborne magnetometer over Western Canada and over the Atlantic east of Bermuda. The accuracy of magnetic charts is computed as a function of the distance over which interpolation is made. The accuracy is not significantly increased by smoothing. A comparison with the autocorrelation functions of simple models indicates that most anomalies originate in a thin layer 11 km below sea level under the continent and 6.5 km below sea level under the ocean. Intense magnetization of the rocks (0.005 to 0.05 cgs) is indicated.