Set of polarization MOJAVE images, observed by the VLBA at 15 GHz. The images are reconstructed using the CLEAN method and the same circular restoring beam, whose FWHM size of 0.7 mas is shown in the bottom-left corner. Stokes I is indicated by contours, with fractional polarization superimposed in false color. Stokes I contours start from a 4σ rms level. The EVPA is indicated by sticks. Drastic changes in the polarization direction around the neutrino arrival (January 5, 2024) are readily apparent (see also Figure 1).