Synoptic maps of the open-field regions modelled by the quasi-steady-state SIP-IFVM MHD model (left), and extreme ultraviolet observations from the 193 Å channel of AIA on board SDO (right) for CR 2219. In the synoptic map, the white and black patches denote open-field regions where the magnetic field lines point outwards and inwards to the Sun, respectively, and the grain patches denote the close-field regions.