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seismology

World Encyclopedia | Date: 2005

seismology Study of seismic waves, the shock waves produced by earthquakes. The velocity of seismic waves varies according to the material through which they pass. Primary (P) and secondary (S) waves are transmitted by the solid earth. Only P waves are transmitted through fluid zones. Seismic waves are detected and recorded by seismographs.

http://usgs.gov

Â© World Encyclopedia 2005, originally published by Oxford University Press 2005.

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