English: The structure of the magnetic field of a magnetar. a) The magnetic lines with induction ${\displaystyle ~B}$. ${\displaystyle ~P_{m}}$ and ${\displaystyle ~L_{m}}$ are the magnetic moment and the star’s spin. b) The orientation of the magnetic moments and spins of neutrons and protons in the equatorial plane; ${\displaystyle ~P_{n}}$ and ${\displaystyle ~L_{n},}$ ${\displaystyle ~P_{p}}$ and ${\displaystyle ~L_{p}}$ are the magnetic moments and spins of neutrons and protons, respectively.