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On the 17th and 18th of August, XRT observed this event from NOAA active region 11543. A filament channel erupts in two phases on the 17th at around 15:40 and later at 22:00 UT. As seen in the movie linked above, XRT captured a small portion of the first phase and most of the second. You can view the entire event in the AIA/193 channel here. After the eruption, supra-arcade downflows are visible in the upper left of the XRT movie and in the still frame above. These features often appear during the expansion of post-flare loops after eruptions and are thought to be "wakes" (trailing regions of low density) behind flux tubes retracting from higher up in the corona. Previous XPOWs on the subject can be found here and here.
Keywords: Downflows, Filament, CME, AR Tracking