Imagem:Earthquake wave paths.gif
Origem: Wikipédia, a enciclopédia livre.
Earthquake_wave_paths.gif (300 × 250 pixel, tamanho do ficheiro: 13 KB, tipo MIME: image/gif)
Cross section of the whole Earth, showing the complexity of paths of earthquake waves. The paths curve because the different rock types found at different depths change the speed at which the waves travel. Solid lines marked P are compressional waves; dashed lines marked S are shear waves. S waves do not travel through the core but may be converted to compressional waves (marked K) on entering the core (PKP, SKS). Waves may be reflected at the surface (PP, PPP, SS).
Seismographs detect the various types of waves. Analysis of such records reveals structures within the Earth.
Source: http://pubs.usgs.gov/gip/interior/fig2.gif ; original upload in english wikipedia, 15 April 2005 by SEWilco
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This image is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of Interior. For more information, see the official USGS copyright policy |
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