| Abstract: | We combine triangulation, trilateration, and GPS observations to determine horizontal strain rates along the Cascadia subduction zone from Cape Mendocino to the Strait of Juan de Fuca. Shear-strain rates are significantly greater than zero (95% confidence) in all forearc regions (26-167 nanoradians/yr), and are not significant in the arc and backarc regions. The deformation is primarily uniaxial contraction nearly parallel to Juan de Fuca-North America plate convergence (N55??-80??E). The strain rates are consistent with an elastic dislocation model for interseismic slip with a shallow 100-km wide locked zone and a deeper 75-km transition zone along the entire megathrust, except along the central Oregon coast where relatively lower strain rates are consistent with 30-40 km wide locked and transition zones. |
| Genre: | Article |
| ProdID: | 70022316 |
| Citation Author: | Murray, M. H.; Lisowski, M. |
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| Citation End Page: | 3634 |
| Citation Issue: | 22 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geophysical Research Letters |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Strain accumulation along the Cascadia subduction zone; 2000; Article; Journal; Geophysical Research Letters; Murray, M. H.; Lisowski, M. |
| Citation Start Page: | 3631 |
| Citation Volume: | 27 |
| Citation Year: | 2000 |
| Type: | citation/reference |
| Text: | Strain accumulation along the Cascadia subduction zone; 2000; Article; Journal; Geophysical Research Letters; Murray, M. H.; Lisowski, M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1029/1999GL011127 |
| Date Other: | Sat, 1 Jan 2000 00:00 -0600 |
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