Longitudinal Wave 1 : Also called: compressional wave: A wave whose direction of propagation is parallel to the displacements of the medium, e.g., sound waves, pressure waves. Compare transverse wave; See also: compression wave
Intergovernmental Oceanographic Commission IOC technical series 37, Tsunami Glossary (A glossary of terms and acronyms used in the tsunami literature - English), , United Nations Educational, Scientific and Cultural Organization UNESCO, Paris, France 1991. http://unesdoc.unesco.org/images/0008/000885/08853 8eb.pdf, (ND/ Tsunami Sci - Brit) {590}