Paul Wilkes does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...
THE U.S. Coast and Geodetic Survey makes magnetic observations at a set of repeat stations every five years, and publishes the results at similar intervals, in the form of tables of secular variation, ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback