The apparent source layer of non dipoles field was near CMB. The apparent source layer of harmonics for n =1 and 2 locate the Earth inner core neighborhood, its position is variety with time.

 
  • 能量密度随谐波阶数的变化在半对数坐标中近似线性 ;非偶极子场的等效磁源深度位于核幔边界附近 ;n =1;2谐波项的等效磁源位于地球内核边缘 ;其位置随时间变化 .
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