現在の学説では地球のコアの所で、磁場が発生し、そこで時折逆転すると言われている。私案では、マントルや外殻の流動と地球の自転で地磁気が発生し、時間を掛け、地殻の両極の内側が磁化され、地殻のみが南北に回転して、その磁極の記録が残っていると考える。In the current theory it is said that a magnetic field occurs at the core of the earth and it is occasionally reversed there. But in my idea geomagnetism occurs due to the flow of the mantle and outer shell and the rotation of the earth.And I think that inside of both poles of crust be magnetized in the long term. And I think that record of geomagnetic is reversal of crust at replaced north-south.