EUV images of the large-scale coronal loop (dashed yellow line) observed by SDO/AIA in 171, 131, 193, and 211 Å before flare. The straight solid lines (S1, S2, and S3) are used to analyze the transverse oscillation. The red arrows point to the locations of the CRF and blowout coronal jet. In panel b, the three tiny boxes along the loop mark the locations for DEM analysis. (a) AIA 171 Å16–Oct-2015 13:36:22 UT, (b) AIA 131 Å16–Oct–2015 13:36:31 UT, (c) AIA 193 Å16–Oct–2015 13:36:32 UT, (d) AIA 211 Å16–Oct–2015 13:36:22 UT.