 In the middle (between 10 and 40 "R"J) and outer (further than 40 "R"J) magnetospheres, the magnetic field is not a dipole, and is seriously disturbed by its interaction with the plasma sheet (see magnetodisk below).Although overall the shape of Jupiter's magnetosphere resembles that of the Earth's, closer to the planet its structure is very different.Jupiter's volcanically active moon Io is a strong source of plasma in its own right, and loads Jupiter's magnetosphere with as much as 1,000 kg of new material every second.