Abstract
The Saint Elias, Alaska, earthquake (magnitude 7.7) of 28 February 1979 is the first major earthquake since 1900 to occur along the complex Pacific-North American plate boundary between Yakutat Bay and Prince William Sound. This event involved complex rupture on a shallow, low-angle, north-dipping fault beneath the Chugach and Saint Elias Mountains. The plate boundary between Yakutat Bay and Prince William Sound had been identified as a seismic gap, an area devoid of major earthquakes during the last few decades, and was thought to be a likely site for a future major earthquake. Since the Saint Elias earthquake fills only the eastern quarter of the gap, the remainder of the gap to the west is a prime area for the study of precursory and coseismic phenomena associated with large earthquakes.
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