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compressional wave

1. n. []

An elastic body wave or sound wave in which particles oscillate in the direction the wave propagates. P-waves are the waves studied in conventional seismic data. P-waves incident on an interface at other than normal incidence can produce reflected and transmitted S-waves, in that case known as converted waves.

Synonyms: acoustic wavedilatational waveP-wave

See: amplitude variation with offsetbody wavedilatationfour-component seismic dataPoisson's ratiorarefactionS-waveshadow zone