Number density (top), velocities (middle), and magnetic field components (bottom) along a ray parallel to the x axis at 0.7 Myr (left panels) and 5.0 Myr (right panels) of evolution. The compressive velocity field, u_x, and the magnetic seed amplifications at the MHD fast shock are given in the middle-left and bottom-left panels, respectively, and the amplified B_y and B_z components in the bottom-right panel.