Magnetometer On The Move

I see that my magnetometer is about to get a promotion. It is to be published in the UK's no. 1 electronics magazine on 7 November. These are the innards (above). OBSERVATION: I felt a bit inadequate about my work when they first published it in Australia. Anyway the Australians claimed that it picked up 4¼nT moving magnetic field (extremely sensitive), and that will be correct. What will it do? It will pick up petrol engines, ocean waves, solar flares, electronic devices, a hairpin at half a metre ... and hopefully treasure. But it must be moving magnetic fields.