| Abstract: | Analysis of morphology, failure and post-failure stages of the Palos Verdes debris avalanche reveals that it may have triggered a significant tsunami wave. Our analysis of the failure itself indicates that the slope is stable under aseismic conditions but that a major earthquake (with a magnitude around 7) could have triggered the slide. A post-failure analysis, considering the debris avalanche as a bi-linear flow, shows that peak velocities of up to 45 m/s could have been reached and that the initial movement involved a mass of rock less than 10 km wide, 1 km long and about 50-80 m thick. Initial wave height estimates vary from 10 to 50 m. Tsunami waves propagating to the local shoreline would be significantly smaller. Such a range demonstrates our lack of proper knowledge of the transition from failure to post-failure behavior related to mass movements. Further investigations and analyses of terrestrial and submarine evidence are required for a proper hazard assessment related to tsunami generation in the Los Angeles area. ?? 2003 Elsevier B.V. All rights reserved. |
| Genre: | Conference Paper |
| ProdID: | 70027138 |
| Citation Author: | Locat, J.; Lee, H. J.; Locat, P.; Imran, J. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 280 |
| Citation Issue: | 3-4 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Marine Geology |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 12 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Numerical analysis of the mobility of the Palos Verdes debris avalanche, California, and its implication for the generation of tsunamis; 2004; Conference Paper; Marine Geology; Locat, J.; Lee, H. J.; Locat, P.; Imran, J. |
| Citation Start Page: | 269 |
| Citation Volume: | 203 |
| Citation Year: | 2004 |
| Type: | citation/reference |
| Text: | Numerical analysis of the mobility of the Palos Verdes debris avalanche, California, and its implication for the generation of tsunamis; 2004; Conference Paper; Marine Geology; Locat, J.; Lee, H. J.; Locat, P.; Imran, J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/S0025-3227(03)00310-4 |
| Date Other: | Thu, 1 Jan 2004 00:00 -0600 |
| Publisher: | |
