One important finding was that most of the geomagnetic field originates at only four broad regions on the core-mantle boundary.

重要的发现之一，是地球的大部份磁场仅来自地核–函交界面上的四个广大区域。

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The history of the Earth's magnetic field provides basic information on the dynamics of core mantle boundary and core convection.

地球磁场的演化历史对研究地核与地幔边界的动力学和地核内的磁流体力学过程提供了重要的信息。

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The lowermost mantle layer is above the core mantle boundary (CMB) and composed of D" region and ultra-low velocity zone (ULVZ)."

地幔底层由具有高地震波速和高密度的D″区和超低速带（ULVZ）组成。

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"Think of it as a fuzzy boundary between the mantle and the core, with patches perhaps 10 to 20 km (6 - 12 miles) across and up to a 1, 000 metres (3, 280 ft) thick, " Jeanloz said.

BBC: Earth's wobbles reveal deep secrets

The origin of this effect may lie at the boundary between the mantle, made up of viscous rock that extends 2, 900 km (1, 800 miles) below the crust, and the outer core, which is thought to be liquid iron with the consistency of water.

BBC: Earth's wobbles reveal deep secrets