Abstract
A line source at (0,γ0) is buried in an elastic half-space (γ > 0) whose surface is free of stress. The source points in an arbitrary direction and excites both P and s waves within the solid. Exact expressions are found for the horizontal and vertical displacements along the y-axis. Wave front singularities are identified and curves are presented for the epicenter displacements. Next, the buried line source, starting at a depth h, is allowed to move downward with constant speed c. By using the dynamic reciprocal theorem, the epicenter displacements for the moving source problem are found in terms of an integral. Explicit expressions are then given for the epicenter velocities which are displayed graphically.
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