Hemispherical asymmetry in the Planck PR4 CMB temperature data. From left to right, we show the position-dependent variance, skewness, and kurtosis averaged over the full sky (upper row), and the two hemispheres defined by the plane orthogonal to the position-dependent variance of each individual map (opposite and same directions as the dipole in the middle and lower rows, respectively). The vertical orange and blue lines correspond to the observed SEVEM and Commander maps, respectively, and the histograms were obtained from the corresponding 600 SEVEM (orange), and 100 Commander (blue) simulations. There is a lack of variance in the hemisphere opposed to the dipole, where 583 (out of 600) SEVEM and 99 (out of 100) Commander simulations have higher values than the data.