| Abstract: | Three-dimensional, finite-difference simulations of a realistic finite-fault rupture on the southern Hayward fault are used to evaluate the effects of random, correlated velocity perturbations on predicted ground motions. Velocity perturbations are added to a three-dimensional (3D) regional seismic velocity model of the San Francisco BayArea using a 3D vonKarman random medium.Velocity correlation lengths of 5 and 10 km and standard deviations in the velocity of 5% and 10% are considered. The results showthat significant deviations in predicted ground velocities are seen in the calculated frequency range (???1 Hz) for standard deviations in velocity of 5% to 10%. These results have implications for the practical limits on the accuracy of scenario groundmotion calculations and on retrieval of source parameters using higher-frequency, strong-motion data. |
| Genre: | Article |
| ProdID: | 70037330 |
| Citation Author: | Hartzell, S.; Harmsen, S.; Frankel, A. |
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| Citation End Page: | 1426 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Bulletin of the Seismological Society of America |
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| Citation Number Of Pages: | 12 |
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| Citation Search Results Text: | Effects of 3D random correlated velocity perturbations on predicted ground motions; 2010; Article; Journal; Bulletin of the Seismological Society of America; Hartzell, S.; Harmsen, S.; Frankel, A. |
| Citation Start Page: | 1415 |
| Citation Volume: | 100 |
| Citation Year: | 2010 |
| Type: | citation/reference |
| Text: | Effects of 3D random correlated velocity perturbations on predicted ground motions; 2010; Article; Journal; Bulletin of the Seismological Society of America; Hartzell, S.; Harmsen, S.; Frankel, A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1785/0120090060 |
| Date Other: | Fri, 1 Jan 2010 00:00 -0600 |
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