Fig. 10.
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SDO/AIA 171 observations of the AR precursor from January 26 to February 3, 2021. We show for every two days the full-disk view of the Sun, with the region of interest marked with a red grid. The grayscale makes intense magnetic structures such as ARs appear black, so that one can see a magnetic precursor at the same latitude as the AR examined in this study.
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