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地磁気逆転

4 件の記事

Illustration of the dynamo mechanism that generates the Earth's magnetic field: convection currents of fluid metal in the Earth's outer core, driven by heat flow from the inner core, organized into rolls by the Coriolis force, generate circulating electric currents, which supports the magnetic field.[1]

ダイナモ理論地球や恒星の磁場を生成するメカニズム

ダイナモ理論地球磁場外核磁気流体力学
2026年8月11日続きを読む →
Computer simulation of Earth's field in a period of normal polarity between reversals.[1] The lines represent magnetic field lines, blue when the field points towards the center and yellow when away. The dense clusters of lines are within Earth's core.[2]

地球磁場惑星を守る巨大な磁気システムの仕組みと変動

地球磁場地磁気逆転ジオダイナモ磁気北極
2026年8月10日続きを読む →
Magnetic stripes are the result of reversals of the Earth's field and seafloor spreading. New oceanic crust is magnetized as it forms and then it moves away from the ridge in both directions. The models show a ridge (a) about 5 million years ago (b) about 2 million years ago and (c) in the present.[1]

古地磁気学が解き明かす地球の歴史とプレートテクトニクスの謎

古地磁気学地磁気逆転プレートテクトニクス海嶺
2026年8月10日続きを読む →
Image of globe combining color with topography.

地球物理学の基礎惑星地球を形作る物理現象と観測手法

地球物理学地磁気逆転プレートテクトニクスジオイド
2026年8月9日続きを読む →