In this paper, we examine curves drawn by a timelike or spacelike curveα on the pseudo-hyperbolic sphere H20 and the unit Lorentzian sphere S21 in three-dimensional Minkowski space R31. We present Lorentz forces and magnetic curves produced by the Frenet frame {TT,NT,BT} on spherical indicatricies in a magnetic field of the curve α. We calculate magnetic vector fields of magnetic curves for TT,NT,BT. Furthermore, we define magnetic flux surfaces constructed by magnetic vector fields along magnetic spherical indicatricies. We obtain developability conditions for these surfaces. Finally, we illustrate magnetic flux surfaces with some interesting examples.