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Excerpt - page 16: "... itel 2004). The spherical divergence represents the ef- fect that seismic energy is spread over an expanding wavefront as the seismicdisturbance propagates in the earth. The amplitude decreases proportionally with the ..."
Excerpt - page 30: "... substantial variation in the shallow structure and in the consequent seismicdisturbances from nearby events. Numerical simulation of seismic wave propagation for ..."