Fractal and Chaos Research of Geomagnetic Polarity Reversal

It is generally accepted that geomagnetic polarity has reversed many times in geological history. However, the causes of the reversal have been unknown up to now. The fractal and chaos theories have been applied to analyze the phenomenon in geomagnetic polarity reversal. It is suggested that the temporal intervals of geomagnetic polarity reversal have the characters of fractal distribution. The system of Earth's magnetic field maintains a sort of temporal or spatial ordered structure by continuously exchanging substance and energy with the exterior. The random of reversal geomagnetic polarity has the self-reversion characteristic of chaos, and the Chaos theory gives a simple and clear explanation for the dynamic cause of geomagnetic polarity reversal.