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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク polar drift ： ウィキペディア英語版 polar drift Polar drift is a geological phenomenon caused by variations in the flow of molten iron in Earth's outer core, resulting in changes in the orientation of Earth's magnetic field, and hence the position of the magnetic north and south poles. The magnetic north pole is approximately 965 kilometers from the geographic north pole. The pole drifts considerably each day, and since 2007 it moves about 55 to 60 km per year as a result of this phenomenon.〔(North Magnetic Pole Moving Due to Core Flux, National Geographic News, December 24, 2009 )〕 ==See also== * Geomagnetic reversal 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「polar drift」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.