Fig. 2.
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Panel (a): SDO/HMI vector magnetogram in the CEA coordinate system at 05:58 UT on 2024 May 6. The red (green) arrows represent the directions of the horizontal field in positive (negative) polarities. The region enclosed by the red rectangle is selected and processed as the bottom boundary magnetic field for the extrapolation. Panel (b): Top view of the magnetic configuration in an NLFFF model. The wFR (eFR) is colored in green (orange). The lower (higher) arcades are colored in cyan (gray). Panel (c): Side view of the same configuration as in panel b.
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