Evolution of exploding granules in the TFG studied in this work. Top: Number of exploding granules detected per minute on the edge of the TFG (dashed line) and inside the TFG (dotted line). The curves were smoothed with a 15-min-wide boxcar. For comparison, the evolution of the TFG area is also plotted (solid line, expressed in Mm² divided by a factor of 50). The origin of time is the birth of the TFG. Bottom: Fraction of exploding granules of the TFG appearing on the edge (solid line). Squares show the fraction of granules of the TFG lying on its edge at some time steps (64, 102, 173, 238, 303, 361, 441, and 513 min). Error bars indicate the standard deviation obtained by counting the granules in consecutive images (see text for details).