1. South Lake Tahoe: Magnetic Surveying Erica Romero and Caitlin Swale

2. Goal To locate the West Tahoe fault Using magnetics data to locate anomalies Scintrex Magnetometer iPhone Crossbow Gain more information about the fault-anomalies below the surface To asses the hazard from an earthquake in the Tahoe Keys area

3. Results Excel plots Models and Cross sections (Burger) Line 1 Line 2 Line 3 Line 4 Line 5 Crossbow data GoogleEarth vs. LIDAR

7. Where the original PowerPoint starts…

8. Overview Introduction Methods The Equipment Data Processing Results Conclusion

9. Introduction Location Goal Previous Work Proposed Lines

10. Location South Lake Tahoe, off of Hwy. 50

11. Goal To locate the West Tahoe fault Using magnetics data to locate anomalies Scintrex Magnetometer iPhone Crossbow Gain more information about the fault To asses the hazard from an earthquake in the Tahoe Keys area

12. Previous Work

13. Proposed Lines

14. Methods- The Equipment Scintrex Magnetometer Two Components (Base Station and Rover) The Base Station Readings every 30 seconds Set up in a cooler to protect it Same location both days

15. The Rover Readings taken every ~10 m 3 readings taken at each stop, then averaged Sensor attached to a staff that must always be orientated towards the north The Tahoe sites were accessed by skiing and snowshoeing

16. Data Processing GeoSoft Attempted to plot the magnetic lines and anomalies into the software; however, the program would not recognize the coordinates, so the program was abandoned. Excel Successfully managed to plot the magnetic readings versus latitude and longitude Able to produce two graphs that show a magnetic anomalies Able to process the iPhone’s Crossbow data Burger Software Able to successfully plot the magnetic anomalies shapes to the data

17. Results Excel plots Models and Cross sections (Burger) Line 1 Line 2 Line 3 Line 4 Line 5 Crossbow data GoogleEarth vs. LIDAR

18. Crossbow Data

19. GoogleEarth vs. LIDAR

22. Conclusions

23. Questions?