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Models of downdip frictional coupling for the Cascadia megathrust

Geophysical Research Letters

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Abstract

We have developed models of downdip frictional coupling along two transects across the Cascadia subduction zone in northern Washington and central Oregon. The models involve complicated downdip coupling profiles. Although not unique, our models closely predict available GPS shortening rates and vertical uplift data. We are able to explain relatively low horizontal shortening rates along the Washington coast and small vertical uplift rates in central Oregon. Our models depart from previous models by inclusion of a deeply coupled region assumed to be related to mafic rocks in both the upper and lower plates of the thrust.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Models of downdip frictional coupling for the Cascadia megathrust
Series title:
Geophysical Research Letters
Volume
27
Issue:
10
Year Published:
2000
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters
First page:
1551
Last page:
1554
Number of Pages:
4