1. Lisa Wald USGS Pasadena U.S. Department of the Interior U.S. Geological Survey USGS Earthquake Hazards Program Earthquakes 101 (EQ101)

2. Global Distribution of Earthquakes

3. Lisa Wald USGS Pasadena U.S. Department of the Interior U.S. Geological Survey USGS Earthquake Hazards Program Plate Tectonics

4. Plate Boundaries

5. Three Types of Faults Strike-Slip Reverse Normal

6. Strike-slip Fault Example

7. 1906 San Francisco Earthquake

8. The San Andreas Fault

9. Will California eventually fall into the ocean???

10. Pacific-North American Plate Boundary

11. Normal Fault Example Dixie Valley-Fairview Peaks, Nevada earthquake December 16, 1954

12. Reverse Fault Example

13. What Controls the Level of Shaking? Magnitude –More energy released Distance –Shaking decays with distance Local soils –amplify the shaking

14. Is there such a thing as “Earthquake Weather”???

15. Earthquake Effects - Ground Shaking Northridge, CA 1994

16. Earthquake Effects - Ground Shaking Northridge, CA 1994

17. Earthquake Effects - Ground Shaking KGO-TV News ABC-7 Loma Prieta, CA 1989

18. Earthquake Effects - Ground Shaking Kobe, Japan 1995

19. Earthquake Effects - Ground Shaking Kobe, Japan 1995

20. Earthquake Effects - Surface Faulting Landers, CA 1992

21. Earthquake Effects - Liquefaction Source: National Geophysical Data Center Niigata, Japan 1964

22. Earthquake Effects - Landslides Turnnagin Heights,Alaska,1964 Source: National Geophysical Data Center

23. Earthquake Effects - Fires KGO-TV News ABC-7 Loma Prieta, CA 1989

24. Earthquake Effects - Tsunamis Photograph Credit: Henry Helbush. Source: National Geophysical Data Center 1957 Aleutian Tsunami

25. Earthquake Magnitude M5 M6 M7

26. Earthquake Location

27. U.S. Department of the Interior U.S. Geological Survey USGS Earthquake Hazards Program http://pasadena.wr.usgs.gov/ http://earthquake.usgs.gov/ Where to go for more information: