Figure 8. Magnetic Field of the Northern Jvan de Fvca and Explorer Plates 



H^» 



collected geomagnetic data are scalar data that are classified. 



Because the scalar data are hnked to locations and track lines, 

 formal review is required to determine declassification policy, 

 and very few of these data have been released. 



Hlustralion (bottom) shows the 

 vertical component of magnetic 

 field in the geologically complex 

 Juan de Fuca area of the 

 northeast Pacific (west of 

 Seattle). The ocean area shovtn 

 contains segments of both the 

 Juan de Fuca and Explorer 

 Tectonic Plates. 



These data, from unclassified 

 Navy aircraft surveys, illustrate 

 the general appearance and 

 spatial variability of high- 

 resolution shipboard magnetic 

 data- 



The more intuitive quannty. 

 balhvmelry. is depicted itopjfor 

 reference, showing in the lower 

 iefi. the northeast section 

 of the Juan de Fuca Ridge and 

 the north-wesl'snutheast 

 oriented continental 'ilope. 



As a result of post-cold- war changes in Navy mission priorities, 

 the Magnetics Program will not be supported beyond FY 95 

 based on present fiscal plans of the Oceanographer of the Navy. 

 To complete existing work, the Navy will finish production of 



