La Jolla, San Diego

1. N La Jolla, San Diego Small faults in San Diego & La Jolla yellow -> gen. fault trend red -> small faults Mt. Soledad formed by tectonic uplift

2. La Jolla and Scripps Canyon Submarine canyon Proximal to LJ Shores and SIO Associated w/ regional faults Terraces along N&S faces of Scripps Canyon Scripps Canyon LJ Canyon

3. Bathymetry of Scripps Canyon Bulletin of the Geological Society of America 60:1597-1612, 1949

7. La Jolla Canyon Survey

8. N Results from Multibeam Data

9. Seismics • Examination of sub-bottom structure • Origin of terraces and associated blocks • Explain asymmetric profile canyon

10. Seismic Surveying Kennedy, 1980 R/V Ellen B. Scripps in 1977 and R/V Polaris in 1970 Yield: 2,000 km medium and high resolution sub-bottom reflection profiles Portions used marked in red

11. Seismic Data

12. Concepts of Ward’s Tsunami Model • Determine perturbation of sea floor shape and project perturbation onto sea surface over time and space • Classical Tsunami Theory: Rigid sea floor Sea water is “incompressible, homogenous, and non-viscous” • Linear wave theory: Ratio of a wave’s amplitude to wavelength much less than 1 Allows modeling of complex events through the superposition of simpler ones

13. Slide would be south towards the bottom of the canyon Failure area broken into separate pistons Each piston can move vertically, horizontally or a combination of the two N Slide Motion

14. Time Corresponds to this This Maximum wave height Modeling Results

15. Tsunami Run Up & Effects During the summer months 17,000 people/day visit La Jolla Shores Beach Streets that are below 5m: Camino Del Oro, Vallecitos, Avenida de la Playa, El Paseo Grande, Paseo del Ocaso Property value range: $275,000 – $1.37 million. Average cost: $700,000

16. Extras