AsthenosphereAs part of the asthenosphere magma layer at top and place under lithosphere. It also involves the movement of plate tectonics The heat and pressure to layers and surface characteristics lithosphere has a low density. Seismic waves are low speed when moving through the asthenosphere layer versus the lithosphere layer. At low speed, called the wave and seismic wave speed is reduced when the strength of the lower layer. Under the ocean plate, which is the size of some classes, the asthenosphere is never far from the surface level and is only a few kilometres away, in the central mountain range of the sea area.
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