The images taken from JHelioviewer correspond to the source of CME_A event before the eruption at 01:21:26 on February 18, 2014. The left and right panels show the images of the solar atmosphere in Solar Dynamics Observatory/Atmospheric Imaging Assembly 304 Å and 131 Å wavelengths, respectively. The white circle highlights the filament area. The right panel shows the HMI magnetogram with the red lines corresponding to the polarity inversion lines (PIL) found in the filament region.