Fig. 4.
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Magnetic configuration of the loop footpoints. Along reach row, the first panel shows the time-averaged LOS magnetogram from HMI, followed by time-averaged images from AIA 1600 Å, 171 Å, and 193 Å channels. The blue and red contours overplotted on top of every image of a given row represent boundaries of ±400 G as derived from the time-averaged HMI magnetogram of that day.
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