Abstract
Wave generations from line sources within the ground are studied. For a compressional origin of step function type in time, we calculate displacements at several points within the ground. In contrast to the surface displacement, we have, deep in the ground, three distinct pulses corresponding to the direct P, reflected P and S phases and no displacement corresponding to the RAYLEIGH wave.
Next, we calculate profiles of surface displacements for an impulsive compressional origin. The importance of surface reflections in generating long waves is shown.
