Total X-ray flux measured by the GOES 15 satellite from 28 December 2012 till 2 February 2013, in the range of 0.05–0.4 nm (black) and 0.1−0.8 nm (green) smoothed over a period of one hour. The flux is measured in units of Wm^-2. The horizontal dashed red lines indicate the flare classes limits. The vertical dashed blue lines represent times of the observations listed in Table A.1, labelled with the identification numbers of the analysed active region.