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It's common for dynamo models to predict a large reduction in the dipole field during a reversal. Proving it in the paleomagnetic record is another matter entirely. To characterize the geometry of the magnetic field, you need several simultaneous measurements, preferably with a good spatial distribution. Instead what you get are relatively infrequent, ...


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The simple answer is YES. The Earth's magnetic field is generated by a self-exciting dynamo in the fluid outer core. The interaction between electric currents and liquid motion sustain this field which is largely oriented along the rotation axis, since this rotation exerts constraints on the convection pattern. The dynamo field is largely dipolar but since ...


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