Swarm tracks elusive ocean magnetism
(PHYSorg.com Space & Earth)

The magnetic field is arguably one of the most mysterious features of our planet. ESA`s Swarm mission is continually yielding more insight into how our protective shield is generated, how it behaves and how it is changing. Adding yet another string to its bow, Swarm is now tracking changes in the magnetic field produced in the oceans in more detail that ever before.