SHOVER * SHEAR‐WAVE GENERATION BY VIBRATION ORTHOGONAL TO THE POLARIZATION **

Abstract

A bstract The radiation distribution of a single vibrator can be described using the formulas given by Miller and Pursey. From these the displacement characteristic for the radial component and also for horizontal component can be derived. This horizontal component is strengthened by adding another vibrator with opposite polarity near the first one. When this horizontal component is oriented perpendicular to the X‐Z plane (plane spanned by the direction of the spread and the vertical axes), an SH‐wave can be generated. Survey results indicate that this method works efficiently.