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The data need to be re-analyzed, allowing for a more complex field shape, but the curve fits the main features of the data, in particular, an initial rise and fall, the broad maximum at about the time of Christ, and the subsequent, steady decay. Conclusion Though complex, this history of the earth's magnetic field agrees with Barnes' basic hypothesis, that the field has always freely decayed. I have merely made explicit two features which were always implicit in the free-decay theory: (a) that motions in the core fluid can disturb the field, and (b) higher-order modes of decay are possible. "Decay of the earth's magnetic moment and the geochronological implications," CRSQ 8 (June 1971) 24-29. — "Electromagnetics of the Earth's field and evaluation of electric conductivity, current, and joule heating of the earth's core," CRSQ 9 (Mar. There were so many spinning nuclei in the earth at creation that, if aligned, their fields would have added up to a large field of sufficient magnitude.As thermal collisions disoriented the nuclear spins, the laws of electricity predict a startup of an electric current within the core of the earth to sustain the field.Standard electromagnetic theory predicts that, after the flood, the higher-order components would die away faster than the dipole part. Because the higher-order components can have either polarity, the strength of the field would fluctuate up and down, as different components died away at different rates. This rapid-reversal model not only explains the general features of the paleomagnetic data, but also some specific features which have puzzled evolutionists. The disturbances in the core fluid during the flood would disrupt the electric current, chopping much of it up into small swirls oriented in different directions. Then the earth's field during and after the flood would not have the simple "dipole" (two poles, north and south) shape it has today.
In 1986, Voyager 2 verified the Uranus prediction, and we should find out about Neptune in early 1990. After creation (and the Fall), the electric current in the earth's core would decay slowly, as would the field, for 1656 years, until the Genesis flood. During this period, the field would have been more than ten times stronger than it is today, thus shielding the earth from cosmic ray particles more effectively, reducing the production of carbon 14 in the pre-flood atmosphere, and making the earth a healthier place. In 1986, I suggested that there was a powerful release of energy in the earth's core at the beginning of the Genesis flood, and that the resulting strong movements in the core field produced rapid reversals of the earth's magnetic field, about one per week, during the year that the flood was laying down the fossil layers at the earth's surface. General physical laws allow rapid reversals, a likely physical mechanism exists to cause the reversals, and observations of the sun's magnetic field demonstrate reversal cycles in nature today. However, such "dynamo" theories are complex, implausible, and incomplete.In the last two decades, they have run into serious problems from magnetic observations on earth His simple and rigorous "free-decay" theory would mean that the current is running down slowly, like a flywheel without a motor; thus the strength of the earth's magnetic field would be steadily decreasing over the centuries.