The thesis compares two different methods for tracking and moving field lines. The first method included tracing one field line and moving each individual vertex along its own path with path following. The second method was done by tracing new field lines and using linear interpolation to move the field lines. The results show that the first method was incapable of rendering the field lines correctly due to the complexity and non-linearity of Earth's magnetic field. While it was successful at animating the initial motion of the field lines, it was not able to demonstrate the field line's change in topology. The second method was able to solve this issue, correctly visualizing field lines in motion, including changes in topology. However, the solution is limited in that it assumes that the vector field is static, which is not the case. To improve the visualization, a method for tracing and tracking field lines through multiple datasets is required. / <p>Examensarbetet är utfört vid Institutionen för teknik och naturvetenskap (ITN) vid Tekniska fakulteten, Linköpings universitet</p>