抄録
A normal force limited in space and time, is applied to the surface(x-axis) of an elastic quarter space, and the propagation of disturbances caused by this external force is studied by the use of the finite difference technique. The feature of wave propagation is shown by the wave profiles on the x and z axes, and also by a number of two dimensional displacement fields in which P and S waves, PS and SS waves, and Rayleigh waves are observed. Velocity and the orbital motion are studied quantitatively in comparison with exact theoretical values.
