Body Waves 12 : A seismic wave that travels through the interior of the earth with a propagation mode that does not depend on any boundary surface. A body wave may be either longitudinal (a P wave) or transverse (a S 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}