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
|
This image should be recreated using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is already available, please upload it. After uploading an SVG, replace this template with template {{|new image name.svg}} in this image. |
| | | | | | | | | | | | | | | | | | | | | | | Tiếng Việt | | | +/-
|
وصلات
الصفحات التالية تحتوي على وصلة لهذه الصورة: