Indirect Evidence for the Structure of the Earth

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Undergraduate (Earth Structure) Geology - Part 1 Apunte sobre Indirect Evidence for the Structure of the Earth, creado por siobhan.quirk el 10/05/2013.
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Seismic WavesVibrations from large earthquakes are detetced as seismic waves by seismographs all around the world. Analysis of many earthquakes over the last 100 years has helped geologists build up a detailed picture of the inside of the Earth.P and S waves are seismic waves that travel through the layers of the Earth, so are called body waves. The travel: faster if the rock becomes more rigid and more incompressible slower if the rock becomes more dense If the rock loses its rigidity completely, S waves slow down until they stop. So S waves cannot travel through a liquid.

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