what is the source of knowing the layered structure of the earth
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Seismic waves
They are the most important source available to understand the layered structure of the earth. The velocity of seismic waves changes as they travel through materials with different elasticity and density.
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Seismic waves : Seismic waves are waves of energy that travel through Earth's layers, and are a result of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made explosions that give out low-frequency acoustic energy
They are the most important source available to understand the layered structure of the earth. The velocity of seismic waves changes as they travel through materials with different elasticity and density.
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