This cross-disciplinary work offers an exceptionally relevant examination of those aspects of earth science dealing with seismic behavior of fractured media. It delivers a lucid exploration of rock mechanics, examining the strengths and weakness of structures beneath the earth's immediate surface. Deliberately non-mathematical and phenomenological in nature, this volume reviews examples of seismic measurements from various fields under widely varied conditions, supported by a wealth of figures drawn from a broad review of the literature. The last chapters delve into deeper, higher stress, and large scale applications, specifically fractured petroleum reservoirs and earthquake source zone interpretation.