"This paper deals principally with seismic risk in the northern Yukon and adjacent areas in which may lie a Mackenzie Valley transportation corridor for gas and/or oil pipelines and related facilities. Some reference is made to the earthquake history of Canada north of 60°N latitude, although detailed seismic risk calculations have not been made for this complete area. The paper also includes estimates of seismic risk parameters in eastern Alaska for the area from the Yukon-Alaska border to longitude 155°W, about 350 km west of Fairbanks"--Introduction, page [1].