Recently, concern has been raised about variability in input parameters affecting seismic hazard results (Newman et al.,1999, 2000a, 2000b, 2001). Uncertainty in seismic hazard calculations for the eastern U.S. (EUS) has been a major concern for the last two decades (EPRI, 1986; SSHAC, 1997). The use of a logic tree to capture knowledge-based uncertainty in seismic hazard calculations has developed over this rime period (Coppersmith and Youngs, 1986; NRC, 1988; Reiter, 1990; Cramer et al., 1996a). A recent reassessment of the current state of knowledge for the New...

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