Left: Image of active region with SHARP-number 2488 (No associated NOAA number provided by JSOC) in AIA channel 171 as an example of a nonflaring active region in February 2013. Middle: Survival curves dominated by fluctuations. No trend is visible. Right: Following the survival curves, the mean lifetime is dominated by large fluctuations. After smoothing with a Gaussian kernel, the curve remains roughly constant at a value of 130 hours (orange line).