Fig. 2.
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Remote sensing properties of AR 12733. Panel (a) presents the AIA 193 Åfull-disk coronal image. The green box corresponds to the position of AR 12733. Panel (b) shows the photospheric magnetic field map of the AR, with the solid blue line outlining the MCA. Panel (c) shows AIA 1600 Åchromospheric images. Panel (d) displays the evolution curve of the ratio between the brightening regions identified in AIA 1600 Å images and the MCA regions over time. Two specific days, when AR 12733 was at the solar disk center, are highlighted with purple and blue shading.
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