Properties of the Ca II K line profiles at 09:44:37 UT. Top row: intensities expressed as radiation temperatures in K_1v and K_2v . Bottom row: wavelength separation of the K₁ minima and full width at half maximum of the central emission peak. The brightness range of all images has been clipped to enhance contrast. The light blue and red contours divide the image into low, intermediate and high brightness areas of the corresponding wavelength-summed Ca II K image.