1. Edge Detection and Depth Estimates – Application to Pseudogravity and Reduced to Pole Results: Part I Edge detection on an oversampled synthetic anomaly with no additional noise Comparing Horizontal Gradient, Total Gradient (Analytic Signal), and Local Wavenumber

2. Magnetic anomaly calculated for 1.5 meters above the ground surface. Dimensions are kilometers, sampling interval is 400 meters, contour interval is 10 nT, inclination = 68 o. Subsurface model: Minimum depth is 250 meters, maximum is 3.35 kilometers Magnetic susceptibility is constant and positive with no remanent magnetization

3. The Model from Different Perspectives East-west faults get deeper and have less throw along strike from the center as they traverse from edge to edge of the model area The north-south fault gets deeper to the south but the throw is constant The long wavelength shape is that of a truncated dome.

4. Total field anomaly; inclination = 68 o Reduced to pole anomaly

5. Top Four Quintiles of Gradient Maxima From the Pseudogravity Classed post map of the four upper quintiles of the combined results of HGM, AS, and LWN analysis of the pseudogravity (purple, blue, green, and red in order of increasing significance).

6. Euler solutions on the TMI

7. Depth models from Euler solutions limited to area with good edge detection

8. Euler solutions (scatter plot) on the original model