a) SDO/HMI and b) AIA images and their respective selected magnetic field lines plots reconstructed from c) SOLIS and d) HMI magnetograms using NLFFF modeling. The color coding shows B_r on the photosphere. Yellow field lines represent closed field lines, while field lines changing in color from yellow to brown (from bottom to the top) represent the open ones. The gray area indicates the region where magnetic field values are close to zero.