Angular position inside the penumbra centred on the umbra, degrees along the polar axis vs. peak intensity in counts of blue and red peaks in PMJ profiles in the Ca ii 8542 Å line. Plotted are the peak-intensities in the respective wing for PMJs with automatically identifiable peaks in the red (crosses, N = 143) and blue (dots, N = 1725) wings of the line. The direction to disk centre is at approximately 270º.