Description: 地球的磁場比較簡單，近似於物理學家所說的偶極磁場，與玩具條形磁鐵的磁場沒有什麼不同。如果將羅盤針懸掛起來，使其可以向各個方向自由移動，就可以追蹤地球磁場的方向。在赤道附近，磁場方向幾乎與地面平行，但當你靠近地球的南北兩極時，磁場方向就會轉向垂直地面的方向。在所謂的磁北極和磁南極，羅盤針是垂直的。地磁極與地理極並不一致。磁極會移動，目前每年大約移動 50 公里，這是使用指南針的航海者需要考慮的因素。

Related Terms:

• 地球自轉
• Scientific Method
• 磁場
• South Pole

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

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