A wave that is propagated by some kind of elastic deformation, that is, a change in shape that disappears when the stresses are removed. A seismic wave is a type of elastic wave. Found on http://earthquakescanada.nrcan.gc.ca/info-gen/glossa-eng.php
motion in a medium in which, when particles are displaced, a force proportional to the displacement acts on the particles to restore them to their ... [1 related articles] Found on http://www.britannica.com/eb/a-z/e/17
Rock is an elastic material that when strained by normal external forces can return to its original state. When the strength of the rock is exceeded, the rock ruptures, generating elastic seismic or earthquake waves. Found on https://www.encyclo.co.uk/local/23001