Geomagnetic field - Expansion, Earth's Core, Magnetism

geomagnetic field

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The expansion phase is less well understood than the growth phase. Many investigators support the “near-Earth neutral-line” model, but concurrently other explanations have been suggested. In the neutral-line model a localized x-type neutral line is formed inside the plasma sheet somewhere between 20 and 40 R_e (Earth radii) behind Earth. The left part of the figure shows the topology of the magnetic field when such a line is first formed. In the noon–midnight meridian of the magnetotail the magnetic field is divided into several regions by the simultaneous presence of two x-type neutral lines. Between the two x lines is ...(100 of 14820 words)

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