For simulation 3D-3-by7 at simulation time 0.39 Myr, from top to bottom: slices showing gas density in the planes y = 0 (left) and ɀ = 0 (right); projected thermal X-ray intensity in the 0.3–2 keV band along the ŷ (left) and ẑ axes (right); and slices of magnetic field strength on a logarithmic colour scale with field orientation shown as streamlines in the planes y = 0 (left) and ɀ = 0 (right). This simulation has the ISM magnetic field in configuration 2, almost perpendicular to the space velocity of the star through the ISM and with no ẑ component.