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Rupture Zones of Great Earthquakes in the Alaska-Aleutian Arc, 1784 to 1980
Lynn R. Sykes, Jerome B. Kisslinger, Leigh House, John N. Davies and Klaus H. Jacob
New Series, Vol. 210, No. 4476 (Dec. 19, 1980), pp. 1343-1345
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1686101
Page Count: 3
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Historical documents indicate that great earthquakes ruptured at least a 500-kilometer-long segment of the plate boundary near the Alaska Peninsula in 1788 and 1847. At least half of a major seismic gap in the Shumagin Islands ruptured during those shocks but has not experienced a great earthquake for at least 77 years. Large shocks along this and other plate boundaries occur in bursts followed by several decades during which there is very little energy release.
Science © 1980 American Association for the Advancement of Science