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Equivalent strike-slip earthquake cycles in half-space and lithosphere-asthenosphere earth models

Journal of Geophysical Research

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Abstract

By virtue of the images used in the dislocation solution, the deformation at the free surface produced throughout the earthquake cycle by slippage on a long strike-slip fault in an Earth model consisting of an elastic plate (lithosphere) overlying a viscoelastic half-space (asthenosphere) can be duplicated by prescribed slip on a vertical fault embedded in an elastic half-space. Inversion of 1973-1988 geodetic measurements of deformation across the segment of the San Andreas fault in the Transverse Ranges north of Los Angeles for the half-space equivalent slip distribution suggests no significant slip on the fault above 30 km and a uniform slip rate of 36 mm/yr below 30 km. One equivalent lithosphere-asthenosphere model would have a 30-km thick lithosphere and an asthenosphere relaxation time greater than 33 years, but other models are possible. -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Equivalent strike-slip earthquake cycles in half-space and lithosphere-asthenosphere earth models
Series title:
Journal of Geophysical Research
Volume
95
Issue:
B4
Year Published:
1990
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
4873
Last page:
4879
Number of Pages:
7