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LVZ

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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