Method and apparatus for producing shear waves for subsurface ge

Details Method and apparatus for producing shear waves for subsurface ge Method and apparatus for producing shear waves for subsurface ge

1979-08-07

1981-08-25

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

181119, 367189, G01V 1155

Patent

active

042863325

ABSTRACT:
Two or a larger even number of compressional wave producing vibrators are symmetrically disposed in two groups on opposite sides of a profile line in closely spaced relationship. The vibrators are energized by the same (or identical) sweep signals, the signals to one vibrator (or group) on one side of the line being separated in phase by 180.degree. from the signals to the vibrator or group on the other side. P-wave components are thereby cancelled, leaving the shear waves to be propagated.

REFERENCES:
patent: 2745507 (1956-05-01), Bodine
patent: 2880816 (1959-04-01), Widess et al.
patent: 3159232 (1964-12-01), Fair
patent: 3159233 (1964-12-01), Clynch et al.
patent: 3205971 (1965-09-01), Clynch
patent: 3208546 (1965-09-01), Lash
patent: 3406777 (1968-10-01), Bemrose

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