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South Lake Tahoe: Magnetic Surveying

South Lake Tahoe: Magnetic Surveying. Erica Romero and Caitlin Swale. Goal. To locate the West Tahoe fault Using magnetics data to locate anomalies Scintrex Magnetometer iPhone Crossbow G ain more information about the fault-anomalies below the surface

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South Lake Tahoe: Magnetic Surveying

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  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

  4. GoogleEarth vs. LIDAR

  5. GoogleEarth vs. LIDAR

  6. 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

  20. GoogleEarth vs. LIDAR

  21. GoogleEarth vs. LIDAR

  22. Conclusions

  23. Questions?

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