South Lake Tahoe: Magnetic Surveying
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Transcript of 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
• 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
GoogleEarth vs. LIDAR
GoogleEarth vs. LIDAR
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
GoogleEarth vs. LIDAR
GoogleEarth vs. LIDAR
Conclusions
Questions?