| Abstract: | This work gives a clear picture of the geometry of aftershock seismicity in a large thrust earthquake. Interpretation of hypocenters and fault plane solutions, from the 1983 Coalinga, Coast Range California, earthquake sequence, in combination with the three-dimensional velocity structure shows that the active faulting beneath the fold primarily consists of a set of southwest dipping thrusts uplifting blocks of higher-velocity material. With the three-dimensional velocity model each individual hypocenter moved slightly (0-2km) in accord with the details of the surrounding velocity structure, so that secondary features in the seismicity pattern are more detailed than with a local one-dimensional model and station corrections. The overall character of the fault plane solutions was not altered by the three-dimensional model, but the more accurate ray paths did result in distinct changes. In particular, the mainshock has a fault plane dipping 30?? southwest instead of the 23?? obtained with the one-dimensional model. -from Author |
| Genre: | Article |
| ProdID: | 70015514 |
| Citation Author: | Eberhart-Phillips, D. |
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| Citation Issue: | B11 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
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| Citation Search Results Text: | Active faulting and deformation of the Coalinga anticline as interpreted from three-dimensional velocity structure and seismicity; 1989; Article; Journal; Journal of Geophysical Research; Eberhart-Phillips, D. |
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| Citation Volume: | 94 |
| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | Active faulting and deformation of the Coalinga anticline as interpreted from three-dimensional velocity structure and seismicity; 1989; Article; Journal; Journal of Geophysical Research; Eberhart-Phillips, D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1989 00:00 -0600 |
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