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 Gain more information about the fault-anomalies below the surface To asses the hazard from an earthquake in the Tahoe Keys area
Results Excel plots Models and Cross sections (Burger) Line 1 Line 2 Line 3 Line 4 Line 5 Crossbow data GoogleEarth vs. LIDAR
Where the original PowerPoint starts…
Overview Introduction Methods The Equipment Data Processing Results Conclusion
Introduction Location Goal Previous Work Proposed Lines
Location South Lake Tahoe, off of Hwy. 50
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
Previous Work
Proposed Lines
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
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
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
Results Excel plots Models and Cross sections (Burger) Line 1 Line 2 Line 3 Line 4 Line 5 Crossbow data GoogleEarth vs. LIDAR
Crossbow Data
GoogleEarth vs. LIDAR
Conclusions
Questions?