| Abstract: | We simultaneously invert travel times of refracted and wide-angle reflected waves for three-dimensional compressional-wave velocity structure, earthquake locations, and reflector geometry in northwest Washington state. The reflector, interpreted to be the crust-mantle boundary (Moho) of the subducting Juan de Fuca plate, separates intrastab earthquakes into two groups, permitting a new understanding of the origins of intrastab earthquakes in Cascadia. Earthquakes up-dip of the Moho‘s 45-kilometer depth contour occur below the reflector, in the subducted oceanic mantle, consistent with serpentinite dehydration; earthquakes located down-dip occur primarily within the subducted crust, consistent with the basalt-to-eclogite transformation. |
| Genre: | Article |
| ProdID: | 70025297 |
| Citation Author: | Preston, L. A.; Creager, K. C.; Crosson, R. S.; Brocher, T. M.; Trehu, A. M. |
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| Citation End Page: | 1200 |
| Citation Issue: | 5648 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Intrastab Earthquakes: Dehydration of the Cascadia Slab; 2003; Article; Journal; Science; Preston, L. A.; Creager, K. C.; Crosson, R. S.; Brocher, T. M.; Trehu, A. M. |
| Citation Start Page: | 1197 |
| Citation Volume: | 302 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Intrastab Earthquakes: Dehydration of the Cascadia Slab; 2003; Article; Journal; Science; Preston, L. A.; Creager, K. C.; Crosson, R. S.; Brocher, T. M.; Trehu, A. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1126/science.1090751 |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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