The Earth's magnetic field is generated as the molten iron of the Earth's outer core revolves around its solid inner core; when surges in the molten iron occur, magnetic tempests are created.
地球磁场是由地球外核的熔铁围绕固体内核旋转而产生的；当铁水激增，就会发生磁暴。
The explanation may be in Earth's mantle, the layer of rock underlying the tectonic plates and extending down over 1,800 miles to the outer edge of Earth's iron core.
解释可能是在地球的地幔中，这是在构造板块下面的岩石层，向下延伸超过1800英里到地球铁芯的外边缘。
The innermost region of the Earth's outer core periodically flows faster or slower, and this action "tugs" at the planet's magnetic field, says Gillet.
地球外核最深区域呈阶段性快慢流动，这一行动“拽动”了地球磁场，吉莱说。
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