タグ

地球物理学

23 件の記事

A model of present-day mass change due to post-glacial rebound and the reloading of the ocean basins with seawater. Blue and purple areas indicate rising due to the removal of the ice sheets. Yellow and red areas indicate falling as mantle material moved away from these areas in order to supply the rising areas, and because of the collapse of the forebulges around the ice sheets.

氷河後リバウンド地球の地殻がゆっくりと復元するメカニズム

氷河後リバウンド地殻均衡アイソスタシー氷河期
Earth's night-side upper atmosphere appears from the bottom as bands of afterglow illuminating the troposphere in orange with silhouettes of clouds at the top, and the stratosphere in white and blue at the top of the middle. Next, the mesosphere (pink area) extends to the orange and faintly green line of the lowest airglow, at about one hundred kilometres at the edge of space and the lower edge of the thermosphere (invisible). Continuing with green and red bands of auroras stretching over several hundred kilometres.

オーロラの科学夜空を彩る光の正体と宇宙のメカニズム

オーロラ北極光南極光太陽風
The internal structure of Earth

地球の内核太陽に匹敵する熱を秘めた惑星の深部

地球の内核地球内部構造地震波鉄・ニッケル合金
Velocity of seismic waves in the Earth versus depth.[1] S-waves (seismic shear waves) cannot propagate in liquids, leading to negligible velocity in the liquid outer core. The seismic velocities very near the surface (≲ 220±30 km) are markedly lower than at greater depths, demarking the LVZ.

低速度層(LVZ)が解き明かす地球内部の構造とダイナミクス

低速度層LVZアセノスフェアリソスフェア
Seismic reflection data

反射法地震探査地下構造を可視化する地球物理学的アプローチ

反射法地震探査地球物理学石油探査地震波
Diagram of the geological process of subduction showing upper mantle

上部マントルの構造と組成地球内部のダイナミズムを解き明かす

上部マントルモホロビチッチ不連続面転移帯カンラン石
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
Topography (top) and corresponding gravity (bottom) signal of Mare Smythii on the Moon containing a significant mascon

マスコン(質量集中)とは何か月や惑星の重力異常がもたらす影響

マスコン質量集中重力異常
Map of Earth's 16 principal tectonic plates[1] Convergent: Collision zone Subduction zone Divergent: Extension zone Spreading centre Transform: Dextral transform Sinistral transform

プレートテクトニクス地球のダイナミズムを解き明かす理論

プレートテクトニクスリソスフェアアセノスフェア大陸移動説
Temperature profile of inner Earth, schematic view (estimated). The red dashed line shows the minimum temperature for the respective mantle rock to melt. The geothermal gradient remains below the melting temperature of the rock, except in the asthenosphere. Sharp rises occur in the uppermost mantle and at the core–mantle boundary.

地温勾配の仕組みと地球内部の熱源エネルギーの源泉を探る

地温勾配地球内部熱放射性崩壊地熱エネルギー
Map of Earth's 16 principal tectonic plates[1] Convergent: Collision zone Subduction zone Divergent: Extension zone Spreading centre Transform: Dextral transform Sinistral transform

プレートテクトニクス地球のダイナミズムを解き明かす理論

プレートテクトニクスリソスフェアアセノスフェア大陸移動説
Map of Earth's 16 principal tectonic plates[1] Convergent: Collision zone Subduction zone Divergent: Extension zone Spreading centre Transform: Dextral transform Sinistral transform

プレートテクトニクス地球のダイナミズムを解き明かす理論

プレートテクトニクスリソスフェアアセノスフェア大陸移動説