1. Tsunami : Evaluating the Hazard in Southern California

2. Outline TSUNAMI DEFINITION/DESCRIPTION CAUSES (HAZARDS) PREPAREDNESS

3. tsunami (seismic sea wave) series of ocean waves of extremely long length generated by: –earthquakes –volcanic eruptions –massive undersea landslides

4. Shallow Water Deep Water Wave Height increases Speed decreases Only a few feet in height Up to 600 mph!

5. FINDING: Tsunamis, generated either locally or from events elsewhere In the Pacific Basin, pose a significant threat to life and property in California. – State of California Seismic Safety Commission

6. Southern California Tsunami Hazards (events that can cause tsunami) Distant earthquakes Cascadia subduction zone Local underwater hazards

7. Distant earthquakes Pacific “ring of fire” 20 th Century events that caused tsunami here. –Chile 1960 –Alaska 1964

8. Cascadia Subduction Zone

9. Local hazards Channel islands faults landslides –Point Dume –Redondo Canyon –Palos Verdes Canyon

10. Local Hazards

11. Los Angeles Tsunami Hazard: Maximum Runup -inundated area

12. Preparedness West coast (including southern California) Los Angeles county

13. West Coast Tsunami Preparedness (look these up) NOAA –DART West Coast & Alaska Tsunami Warning Center

14. http://nctr.pmel.noaa.gov

15. 1.2. 3.4.

16. LOS ANGELES COUNTY TSUNAMI PREPAREDNESS ( for more information, you can use the county website) Alert and Warning Response and Recovery Coordination of emergency response agencies www.lacoa.org