Rotation of the Earth's inner core

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Breve resumo:
Precession in the rotation of the inner core seems to induce a precession of the geomagnetic field with a period of about 3.3X10 10 rad/s. This value corresponds to an elongation of 3.2X10 6 of the prolate spheroid of the inner core. Friction due to the liquid outer core seems compatible with a viscosity of the order of 10 4 Pa.s (10 5 poises).On the other hand, gravitational pulsations could be an adequate mechanism for producing magnetics reversals.​



Info Adicional:
Precession in the rotation of the inner core seems to induce a precession of the geomagnetic field with a period of about 3.3X10 10 rad/s. This value corresponds to an elongation of 3.2X10 6 of the prolate spheroid of the inner core. Friction due to the liquid outer core seems compatible with a viscosity of the order of 10 4 Pa.s (10 5 poises).On the other hand, gravitational pulsations could be an adequate mechanism for producing magnetics reversals.



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