In their article, Atkinson and Boore (1998) (AB) attempt to evaluate a number of proposed source models for eastern North America (ENA) by comparing “predicted” ground motions for the source models against certain ground-motion data (as listed in their Table 1). The reliability of their conclusions evidently depends both on the reliability of their predicted ground motions and on the reliability of their assumed data. Although the extent to which the data used are representative of ground motions in ENA is also questionable, in this comment only the question of the reliability of AB's predicted ground motions and...

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