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Seismic wave

A seismic wave is a wave that travels through the Earth, most often as the result of a tectonic earthquake, sometimes from an explosion.

There are two types of seismic wave, namely, 'body wave' and 'surface wave'.

There are two kinds of body waves: primary (P-waves) and secondary (S-waves).

Surface waves are analogous to water waves and travel just under the Earth's surface.

They travel more slowly than body waves.

Note: This article excerpts material from the Wikipedia article "Seismic wave", which is released under the GNU Free Documentation License.

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