Fig. 4.
Panel a: AIA 1700 Å TS. Panel b: corresponding normalized wavelet power. The photospheric power is mainly concentrated in the broad range (2−9 min), as outlined by white contours (95% global confidence levels). Panels c and d: IRIS SJI 1400 Å TS and its corresponding normalized wavelet power, respectively. The power within the TR is distributed within the period of 2−8 min. The white contours in each wavelet map (panels b and d) outline the 95% global confidence levels. The cross-hatched white area outlines the COI.
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