OK, magnetic north wobbles all over the place at the moments its some place over the bearing sea and heading for Russia, when I was young it was nearer canada, it moves at this latitude on average 4 degrees a year and its route is completely random. and its actually no where near Grid or true north
where E is energy, m is mass, and c is the speed of light. The formula is dimensionally consistent and does not depend on any specific system of measurement units. The equation E = mc2 indicates that energy always exhibits relativistic mass in whatever form the energy takes.[2] Mass–energy equivalence does not imply that mass may be "converted" to energy, but it allows for matter to be converted to energy. Through all such conversions, however mass remains conserved (i.e., the quantity of mass remains constant), since mass is a property of matter and also any type of energy. Energy is also conserved. In physics, mass must be differentiated from matter. Matter, when seen as certain types of particles, can be created and destroyed (as in particle annihilation or creation), but a closed system of precursors and products of such reactions, as a whole, retain both the original mass and energy thoughout the reaction