Emerging flux region in AR 12401 and a representative energy-releasing event detected simultaneously by Hinode and IRIS [reproduced from Toriumi et al. (2017) by permission of the AAS]. The top row shows the Hinode/SOT-SP circular polarization (CP) map and IRIS Mg ii k3 intensity map. The red contour shows the enhanced brightenings in SOT Ca ii H. The second row shows the AIA 1700 Å, IRIS 1400 Å slit-jaw image, SOT Ca ii H, and the SOT-SP CP map of the representative event indicated by a yellow arrow in the top left-hand panel. White contours delineate the enhanced Ca brightening, while the arrow shows the direction of the disk center. Yellow and turquoise dots indicate the concave-up and concave-down polarity inversion lines, respectively. The third and fourth rows show three IRIS UV spectra and SOT-SP Stokes V/I profiles. Three colors represent the three locations in the second row, black profiles are the quiet-Sun levels, and the vertical lines indicate the line centers. (Color online)