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Fundamental site resonance periods due to earthquake shaking have been calculated in a sediment-filled bedrock basin located near Alfred, Ontario, using a high-resolution shear-wave-reflection method. This area is characterized by postglacial marine (Champlain Sea) sediments exhibiting surface disturbance that has been postulated to be the result of paleo-earthquake activity ca. 7060 BP. Hence, the study of parameters that govern the basin response to shaking will aid in understanding deformation within this zone. Shear waves can provide straightforward estimates of the fundamental site period from nearly vertical reflection travel times. Data have been collected at 21 locations that show wide variations in values of fundamental site periods. The quality of the reflection data strongly depends on near-surface conditions. A refraction study in one area provided the shear-wave velocities within bedrock and overburden necessary to evaluate the resonance amplification effect. 2001-D3 B. Benjumea et al. 1 CURRENT RESEARCH RECHERCHES EN COURS 2001 Article Article Titles Titres Purchase Information Information pour acheter

Use of high-resolution shear-wave-reflection methods for determining earthquake fundamental site period response near Alfred, Ontario