Time-series observations of the solar wind interaction with Mercury’s magnetosphere on 2011 December 26. Panels give the magnitude of the magnetic field ∣B∣, the three components (B_X, B_Y and B_Z) of the magnetic field in the MSO coordinate system, respectively, and display the solar zenith angle. The arrows mark the identified boundaries of the bow shock (in yellow) and the magnetopause (in blue).