CGRG Bibliography of Canadian Geomorphology
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Author : Halchuk, S.; and Adams, J.
Date : 2001.
Title : Fourth generation seismic hazard maps for Canada.
Publication : AGU 2001 Fall Meeting, Moscone Centre, San Franciso, California, December 10-14, 2001.
Issue :
Page(s) :
Abstract
The Geological Survey of Canada's fourth generation seismic hazard model was released for public comment in 1996 and will be revised to form the basis for seismic design codes in the year-2003 edition of the National Building Code of Canada (NBCC). The Cornell-McGuire method is used, with two complete earthquake source models together with a deterministic Cascadia subduction earthquake and a floor hazard level for the low seismicity regions. A "robust" method is used to combine the model results: the mapped value is the largest of the four values. Spectral-value and peak-acceleration maps and Uniform Hazard Spectra for main cities have been produced for median (50th percentile) ground motions at a 10\% and a 2\% probability of exceedence in 50 years. While there is general agreement in relative hazard levels, as shown by comparing hazard between Canadian and appropriate U.S. cities, hazard contours do not necessarily match across the border. Variations in the definition of source zones, choice of attenuation relations, choice of mean vs median hazard level, and method for incorporating Cascadia subduction earthquakes all contribute to these cross-border differences.
Bibliography of Canadian Geomorphology