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Strain in southern California: Measured uniaxial north-south regional contraction

Science

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Abstract

The plate tectonics model of the Pacific moving northwest relative to North America implies that the regional strain in California should be simple shear across a vertical plane striking N45??W or equivalently equal parts of north-south contraction and east-west extension. Measurements of the strain accumulation at seven separate sites in southern California in the interval 1972 through 1978 indicate a remarkably consistent uniaxial north-south contraction of about 0.3 part per million per year; the expected east-west extension is absent. It is not clear whether the period from 1972 through 1978 is anomalous or whether the secular strain in southern California is indeed a uniaxial north-south contraction.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Strain in southern California: Measured uniaxial north-south regional contraction
Series title:
Science
Volume
202
Issue:
4370
Year Published:
1978
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
883
Last page:
885
Number of Pages:
3