New CH in the southern hemisphere. Left: AIA 193 Å full-disk image taken on February 5 at 10:59 UT. A newly formed CH is visible along the central meridian south of the equator, marked by the box. Right: extraction of the CH inside the box using CATCH. The red line gives the CH boundaries as obtained with a threshold of 35% of full-disk median intensity. The yellow cross marks the center of mass of the surface covered by the CH.