Chapter
Dec 31, 2015
Source Mechanism of the Tsunami of March 28, 1964 in Alaska
Publication: Coastal Engineering 1964
Abstract
The distribution of permanent, vertical crustal dislocations, the times and directions of early water motion in and around the generation area, and the unusual lowfrequency character of the tsunami record obtained from Wake Island, all suggest that the tsunami associated with the great Alaskan earthquake of March 28, 1964 was produced by a dipolar movement of the earth's crust, centered along a line running from Hinchinbrook Island (Prince William Sound) southwesterly to the Trinity Islands. The positive pole of this disturbance encompassed most of the shallow shelf bordering the Gulf of Alaska, while the negative pole lay mostly under land. Thus, the early effect was the drainage of water from the shelf into the Gulf, thus generating a long solitary wave, which radiated out over the Pacific with very little dispersion.
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Coastal Engineering 1964
Pages: 166 - 190
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© 1965 American Society of Civil Engineers.
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Published online: Dec 31, 2015
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WM. G. Van Dorn
University of California Scripps Institution of Oceanography La Jolla, California
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