Data of the International Bank of Digital Information on the time distribution of
the virtual dipole moment (VDM), supplemented by data of more recent studies (a total
of 5645 values), were used as the basis for analyzing the distribution of VDM values
for Earth's history using the concept of the Earth's magnetic dipole field. The VDM
behavior is characterized by a positive linear trend from 4.2 x 10 (22) Am-2 (4.2
GA ago) to 5.15 x 10(22) Am-2 today. Against a linear increase in the field, VDM undulations
nonuniformly distributed over time have been recorded, varying in magnitude from 1.7
to 3.7 x 10(22) Am-2 wavelength from 220 to 920 Ma. The average wavelength of such
undulations is estimated at 570 Ma, which in order of magnitude approaches the period
of the Wilson cycle. It has been revealed for the first time that the magnitudes of
magnetic field undulations over time are oscillatory in nature and increase toward
present day.
