Surface magnetic field distribution of HR 5624 derived from the Si LSD profiles. The star is shown at five rotation phases, which are indicated above each spherical plot column. The inclination angle is i = 65°. The spherical plots show the maps of panel a: field modulus; panel b: horizontal field; panel c: radial field; and panel d: field orientation. The contours over spherical maps are plotted with a step of 1 kG. The thick line and the vertical bar indicate positions of the rotational equator and the pole, respectively. The colour-bars give the field strength in kG. The two different colours in the field orientation map correspond to the field vectors directed outwards (red) and inwards (blue).