File:Earthquake wave paths.svg

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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Vectorized. The original can be viewed here: Earthquake wave paths.gif. Modifications made by Hardwigg.

Description

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.

Date

Source

http://pubs.usgs.gov/gip/interior/fig2.gif ; original upload in english wikipedia, 15 April 2005 by SEWilco

Author

SEWilco

Permission
( Reusing this file)

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 the Interior. For more information, see the official USGS copyright policy.

	This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See 206.02(b) of Compendium II: Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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Geology

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