Means and method for recording seismic signals

Method and apparatus for acoustic logging of a borehole

Method and apparatus for acoustic well logging of earth borehole

Method and apparatus for dynamically investigating a borehole

Method and apparatus for extracting derivatives from surface aco

Method and apparatus for processing seismic signals from low ene

Method and apparatus for seismic geophysical exploration

Method and apparatus for testing a plurality of geophones

Method and apparatus for transmitting geophone signals over cabl

Method and system for achieving vibrator phase lock

Method for describing fractures in subterranean earth formations

Method for determining elastic constants of geological formation

Method for generating and detecting seismic shear wave energy in

Method for seismic exploration for enhanced results in simulated

Method for suppressing side lobes in correlation processes

Method of and apparatus for focusing ultrasonic waves in a focal

Method of connecting flexible numbers of geophone flyer groups t

Method of determining weathering corrections in seismic operatio

Method of determining weathering corrections in seismic record p

Method of forming color graphic displays from input data