Archaeomagnetic dating problems
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.
Such a rapid decay could not have continued for more than about 10,000 years; otherwise the initial strength of the field would have been impossibly high.
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.
Today, scientists think the earth is an electromagnet; the source of the magnetic field is probably a large electric current—billions of amperes—circulating in the earth's fluid core.
But there is still a mystery today: Scientists, who assume that the earth is old, conjecture that complicated flows of the fluid in the core somehow started the current and have maintained it for billions of years.