A new theory about the origin of the earth's magnetic field

The mechanoelectrodynamic theory on the origin of the dipole part of the earth's magnetic field proposed by Zidarov (1981) is analyzed and refined. A scheme is proposed offering a fairly good explanation of the origin, expansion and maintenance of a constant terrestrial magnetic field, as well as the inversion of its polarity. It also explains the predominance of inverse polarity during periods when the angular velocity of the earth increases and that of normal polarity during periods when this velocity decreases, as discussed by Creer (1975). It is noted that the very appearance of such periods was explained by Zidarov on the basis of the leapwise advance of the earth's nucleus as a whole toward the axis of rotation of the earth.