The status ofPSconverted waves in crustal studies

PS converted waves, which are seismic body waves resulting from the conversion of an incident parent P wave at a boundary within the earth's crust to a refracted vertically polarized shear SV wave, have been observed on seismograms and utilized in the study of crustal structure. The experimental work done to date with PS converted waves, principally by Russian and American investigators, is outlined. A line of investigation is suggested which will evaluate the usefulness of these waves in crustal studies and other investigations.