Conclusion At present, the only working theory for the origin, fluctuations, rapid reversals, and decay of the field is a creationist theory--a theory that fits all the data.
Thus, according to the best theory and data we have, the earth's magnetic field certainly is less than 100,000 years old; very likely less than 10,000 years old, and fits in well with the face-value Biblical age of 6,000 years. Humphreys was an ICR Adjunct Professor of Physics and a physicist at Sandia National Laboratories, Albuquergue, New Mexico.
However with over thirty-seven years of in depth research taking in sites from China, Peru, Mexico and Egypt, one scientist has as at last managed first to understand and then to reveal what lies behind this greatest of archaeological mysteries: a message of paramount importance for all mankind, through time and space.
The earth's magnetic field is a powerful witness for a world much younger than the billions of years required by evolutionary theories.
Dynamic decay explains the main features of the data, especially several features evolutionists find puzzling.
In 1988 I published a review paper documenting the great diversity and reliability of the data. A Creationist Theory for Reversals and Fluctuations The validity of the data required a new theory to explain them.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.The data and the dynamic-decay theory imply that, ever since creation, the field has always lost at least half its energy every 700 years. The maximum energy in the figure comes from another theory I proposed about the nature of the field when God created the earth, a theory which successfully predicted space probe measurements of planetary magnetic fields. Extrapolating today's energy decay rate back (along the dotted straight line labeled "free decay") to that limit yields a maximum age of 8700 years.According to the dynamic-decay theory, the true age would be less than that because of extra losses during the reversals and fluctuations.