Method and apparatus for producing combined seismic shear - and compression waves in the ground

摘要

A vibratory seismic surface source 10 includes a single vibrating mass, the energy of which is coupled to the earth through a second contacting base plate 12. Means such as hydraulic cylinders 20, 22, 24, (26), are provided for varying the inclination and azimuth of the vector path 68 traversed by the reciprocating mass, such that any desired combination of compressional and shear waves, both SH and SV type, may be generated and recorded simultaneously at a point on the earth's surface remote from the source, Fig. 3 (not shown). IMAGE