Wednesday, September 18, 2013

300 Year Old Riddle Answered: What Direction Does The Solid Center Of Earth Spin

Scientists at the University of Leeds have solved a 300-year-old riddle about which direction the centre of Earth spins. Seismic probing of the earth’s deep interior has shown that the inner core, the solid core of our planet, rotates slightly faster (i.e., eastward) than the rest of the earth. Quite independently, observations of the geomagnetic field provide evidence of westward-drifting features at the edge of the liquid outer core. The associated electromagnetic torque currently is westward in the outermost outer core, whereas an equal and opposite torque is applied to the inner core.



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