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Bulletin of the Seismological Society of America; July 1956; v. 46; no. 3; p. 165-173
© 1956 Seismological Society of America
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Earthquakes off the north Pacific Coast of the United States*

DON TOCHER

UNIVERSITY OF CALIFORNIA, BERKELEY, CALIFORNIA

Abstract

Epicenters of most of the larger earthquakes occurring off the coast of northern California and Oregon lie in two zones. One zone includes the north-facing submarine Gorda Escarpment, which extends nearly due west from Punta Gorda, and the south-facing Mendocino Escarpment as far offshore as long. 127° W. The other zone extends northwestward from the region of Cape Mendocino, indicating a linear extension of the San Andreas Rift zone as far as lat. 44° or 45° N.

Footnotes

* Manuscript received for publication November 28, 1955.




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