Regional intensity values were computed by averaging 

 the 9 observed values of total Intensity at the center, 

 corners, and mid-points of the sides of a 60-mile square. 

 This average value was then plotted at the center of the 

 60-mile square. Regional intensity values were computed 

 in this manner at 10-mile intervals on a north-south, 

 east-west grid. These values were then contoured and 

 graphically smoothed to produce the Computed Regional 

 Magnetic Intensity Contour Chart (Figure 6) . 



Because bathymetric and magnetic data were collected 

 simultaneously, the bathymetric charts and magnetic chartt 

 may be used for direct comparison of the data. No sound- 

 velocity or other corrections have been applied to the 

 bathymetric data. 



