Crosscuts along the XZ plane through three bubble cases: a spherical bubble with an off-centered explosion center (left), a nonspherical bubble with the explosion center at the origin of the axes (middle), and that off-centered (right). The explosion center is marked with a black asterisk and the origin of the axes with a black dot. The bubble shape for the middle and right panels are the same. The direction of the initial magnetic field (also marked with the red arrow) is the same for every panel, and as in Fig. 1. B⁰ belongs to the XZ plane. Colors and streamlines follow the same convention as in Fig. 1.